CROSS REFERENCE TO RELATED APPLICATIONS This invention was the subject matter of Document Disclosure Program Registration No. 539,425, filed in the United States Patent and Trademark Office on Oct. 6, 2003.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT Not Applicable.
REFERENCE TO MICROFICHE APPENDIX Not Applicable
BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to the field of bookend constructions in general and in particular to adjustable width bookend constructions.
2. Description of Related Art
As can be seen by reference to the following U.S. Pat. Nos. 314,436; 758,868; 1,363,138; 1,598,467; 1,674,359; 1,891,420; and 6,354,446; the prior art is replete with myriad and diverse adjustable width bookend constructions.
While all of the aforementioned prior art constructions are more than adequate for the basic purpose and function for which they have been specifically designed, they are uniformly deficient with respect to their failure to provide a simple, efficient, and practical adjustable width bookend construction wherein, the book engaging end units clutch, support and suspend a spanner unit in a vertical fashion.
In virtually all of the prior art constructions, the book engaging units are movably supported on a horizontal spanner unit that rests on a horizontal support surface thereby producing a rather conventional and predictable orientation of the major components of an adjustable width bookend.
As a consequence of the foregoing situation, there has existed a longstanding need among book loving consumers for a new and improved adjustable width bookend construction that has radically different aesthetic appearance and function that serves not only to securely support a plurality of books in an upright orientation, but which will also serve as a topic of conversation, and the provision of such a construction is a stated objective of the present invention.
BRIEF SUMMARY OF THE INVENTION Briefly stated, the adjustable width bookend construction that forms the basis of the present invention comprises a pair of book engaging end units that suspend and are slidably disposed relative to a spanner unit.
As will be explained in greater detail further on in the specification, each of the book engaging end units comprises a generally L-shaped bookend member formed by a rear wall and a side wall wherein, each rear wall is provided with a horizontally disposed support member to support a portion of the spanner unit and each side wall is provided with a vertical slot dimensioned to slidably receive and clutch another portion of the spanner unit.
In addition, the spanner unit comprises an elongated rectangular cross-member dimensioned to be slidably received in the vertical slots in each of the side walls and be suspended from the support members on the rear walls of the respective bookend members.
Furthermore, the outboard ends of a cross-member may be provided with end cap members configured to limit the lateral travel of the bookend members relative to the cross-member.
Furthermore, the outboard ends of a predetermined length cross-member may be provided with end cap members may be configured to extend beyond and down the opposite edges of an elevated level surface to prevent lateral displacement of the bookend construction relative to the elevated level surface.
Furthermore, holding block assemblies are provided to prevent aftward displacement of the bookend construction relative to a collection of books.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS These and other attributes of the invention will become more clear upon a thorough study of the following description of the best mode for carrying out the invention, particularly when reviewed in conjunction with the drawings, wherein:
FIG. 1 is a perspective view of the adjustable width bookend construction in use configured to prevent lateral displacement of the bookend construction relative to an elevated level surface;
FIG. 2 is a front elevation view of the bookend construction;
FIG. 3 is an exploded perspective view of the bookend construction;
FIG. 4 is a perspective view of the adjustable width bookend construction in use configured for open surface placement of the bookend construction; and,
FIG. 5 is a perspective view of two identical holding block assemblies in use.
DETAILED DESCRIPTION OF THE INVENTION As can be seen by reference to the drawings, the adjustable width bookend construction that forms the basis of the present invention is designated generally by the reference number 10. The construction 10 comprises a pair of mirror image book engaging end units (bookend members) 20 20 and a spanner unit 30. These units will now be described in seriatim fashion.
As shown in FIGS. 1 through 4, the mirror image book engaging end units 20 20 each comprises a generally L-shaped bookend member 20 having a vertically oriented rear wall panel 21 and a vertically oriented side wall 22.
The lower portion of the free end of the rear walls are each provided with inwardly projecting support members 23 23, and as can best be seen by reference to FIG. 3, the lower portion of the captive end of the side walls 22 22 are each provided with elongated slots 24 24 which extend upwardly from the bottom of each of the side walls 22 22.
Furthermore, as shown in FIGS. 1 through 4, the spanner unit 30 comprises an elongated rectangular cross-member 31 dimensioned to be slidably received within the slots 24 24 in the side walls 22 22 and supported on the support members 23 23 in the rear walls 21 21 such that the bookend members 20 20 are linearly clutched as well as slidably adjustable toward and away from one another on the cross-member 31.
In addition, as best shown in FIGS. 2 and 3, the opposite ends of the elongated cross-member 31 may be provided with end cap members 32 32 wherein, each comprises an end plate 33 having an inwardly facing vertical groove 36 dimensioned to slidably receive one end of the cross-member 31 and further adapted to receive a lower support leg 34 that the cross-member 31 rests upon. As shown in FIG. 5, each of the end cap members 32 32 may be adapted such that the inwardly facing vertical groove 36 slidably receives a capture arm 35 that rests on the cross-member 31.
Furthermore, the forward and aftward projecting portions of each end plate 33, and each upwardly projecting capture arm 35, each function to limit the lateral displacement of each of the bookend members 20 20 relative to the cross-member 31.
As shown in FIGS. 1 through 3, if the cross-member 31 spans the opposite edges of an elevated level surface, the end cap members 32 32 may also be configured to extend beyond and down the opposite edges of the elevated level surface to prevent lateral displacement of the bookend construction 10 relative to the elevated level surface. Otherwise, as shown in FIG. 4, the end cap members 32 32 may be configured to rest on a level surface.
Finally, as shown in FIG. 5, an optional identical pair of holding blocks 40 each comprising a rear block 41, a base mat 42, and an attaching member 43 for attaching the base mat 42 to the rear block 41, functions to prevent aftward displacement of the bookend construction 10 relative to a collection of books functionally supported by the bookend construction 10. The attaching member 43 is dimensioned to rest with clearance beneath the cross-member 31. In this design, the aft edge of the base mat 42 folds upward and is sandwiched between the attaching member 43 and the rear block 41, typically attached using screws through the attaching member 43 and base mat 42 into the rear block 41. Part of the supported collection of books rests on each base mat 42 fixing each holding block assembly 40 in place. The base mat is thin so as not to interfere with the level integrity of the surface, yet durable to withstand removal and replacement of individual books. The advantage of holding block assemblies becomes apparent when considering a large collection of books in use.
Although only an exemplary embodiment of the invention has been described in detail above, those skilled in the art will readily appreciate that many modifications are possible without materially departing from the novel teachings and advantages of this invention. Accordingly, all such modifications are intended to be included within the scope of this invention as defined in the following claims.
Having thereby described the subject matter of the present invention, it should be apparent that many substitutions, modifications, and variations of the invention are possible in light of the above teachings. It is therefore to be understood that the invention as taught and described herein is only to be limited to the extent of the breadth and scope of the appended claims. TABLE 1
Patents for Bookend Utility and Design
Patent Date Title Description
153227 Jul. 21, 1874 self adjusting book racks base channel sliding spring loaded
158751 Jan. 12, 1875 book racks base fixed hinged
161293 Mar. 23, 1875 book support shelf partition positive lock
174262 Feb. 29, 1876 book rack base sliding hinged
186974 Feb. 6, 1877 book support standard bookend interlocking partition
202959 Apr. 30, 1878 book supports standard bookend
305863 Sep. 30, 1884 book suppport shelf sliding
314436 Mar. 24, 1885 book holder wraparound rigid
314437 Mar. 24, 1885 book holder shelf side filler
348382 Aug. 31, 1886 book holder shelf side filler
355511 Jan. 4, 1887 book support shelf sliding
386674 Jul. 24, 1888 paper or bill file base partition position stop
388674 Aug. 28, 1888 book support for shelves shelf sliding
423647 Mar 18, 1890 bill file base partition position stop
431373 Jul. 1, 1890 book and paper rack base position stop
436704 Sep. 16, 1890 book support shelf channel positive lock
451729 May 5, 1891 paper or bill file base partition position stop
452673 May 19, 1891 book support shelf sliding hinged linear clutch
470050 Mar. 1, 1892 letter file base fixed hinged
481505 Aug. 23, 1892 book support hanging partition position lever
489693 Jan. 10, 1893 adjustable book rack base crossmember intersliding
497993 May 23, 1893 automatic file holder base channel spring loaded
502321 Aug. 1, 1893 adjustable shelf partition standard bookend
504233 Aug. 29, 1893 book support shelf sliding
518573 Apr. 17, 1894 book rack base crossmember partition sliding
525186 Aug. 28, 1894 knockdown rack base channel thumbscrew lock
527897 Oct. 23, 1894 book support base channel sliding
538500 Apr. 30, 1895 document file base crossmember positive lock
560851 May 26, 1896 book support hanging partition linear
575294 Jan. 12, 1897 book support & label holder shelf partition sliding
575832 Jan. 26, 1897 book support hanging partition
583494 Jun. 1, 1897 book support base channel
593758 Nov. 16, 1897 portable book rack base partition position stop
608515 Aug. 22, 1898 book support shelf scissor side filler
657847 Sep. 11, 1900 book case or rack shelf partition position lever
660264 Oct. 23, 1900 divisible shelf shelf crossmember partition position stop
668961 Feb. 26, 1901 book rack shelf scissor filler
670446 Mar. 26, 1901 holding block for cases base channel sliding spring loaded
679054 Jul. 23, 1901 shelf book support shelf partition sliding
712936 Nov. 4, 1902 book holder shelf partition position stop
758868 May 3, 1904 book support crossmember partition position stop
767037 Aug. 9, 1904 shelf book support shelf partition sliding
774984 Nov. 15, 1904 book support base position stop
779262 Jan. 3, 1905 tray base channel sliding
781890 Feb. 7, 1905 book supporter shelf sliding
793364 Jun. 27, 1905 book & paper rack base partition interlock
833887 Oct. 23, 1906 book support base channel partition hinged stowed
850977 Apr. 23, 1907 book support standard bookend
903769 Nov. 10, 1908 book support and adjustable shelf partition shelf partition thumbscrew lock
931362 Aug. 17, 1909 movable partition or book support base position stop
934148 Sep. 14, 1909 book rest base fixed
935560 Sep. 28, 1909 book support hanging sliding
945877 Jan. 11, 1910 desk book rack base crossmember intersliding
999974 Aug. 8, 1911 file shelf base channel partition sliding
1006328 Oct. 17, 1911 cigar rack base crossmember intersliding
1022150 Apr. 2, 1912 book rack base crossmember intersliding hinged
1049726 Jan. 7, 1913 display rack base crossmember partition sliding
1237101 Aug. 14, 1917 book holder base channel dovetailed sliding spring loaded
1257528 Feb. 26, 1918 file rack base partition position stop
1283259 Oct. 29, 1918 ledger rack base channel mechanical
1317550 Sep. 30, 1919 book rack base crossmember intersliding
1336981 Apr. 13, 1920 book rack base channel sliding
1340317 May 18, 1920 book shelf base channel sliding
1358853 Nov. 16, 1920 binder tray base channel linear clutch
1363138 Dec. 21, 1920 bookrack base crossmember partition
1370279 Mar. 1, 1921 folding book stop standard bookend
1379766 May 31, 1921 portable book holder base fixed
1395825 Nov. 1, 1921 clamping device base recoiling strap
1396910 Nov. 15, 1921 book frame and label holder standard bookend shelf
1401171 Dec. 27, 1921 binder rack base position stop roller
1409136 Mar. 7, 1922 book end standard bookend
1415110 May 9, 1922 file rack base partition position stop
1460642 Jul. 3, 1923 book rack base channel sliding
1477634 Dec. 18, 1923 shipping case and display rack base fixed
1489804 Apr. 8, 1924 follow board base channel partition linear
1506204 Aug. 26, 1924 library book support & index shelf crossmember partition fixed
1508610 Sep. 16, 1924 shelving shelf partition position stop
1557419 Oct. 13, 1925 book end standard bookend
1562275 Nov. 7, 1925 book supporting device base partition position stop
1598467 Aug. 31, 1926 book support standard bookend (Weeks)
1621410 Mar. 15, 1927 supporting rack base position stop
1660823 Feb. 28, 1928 card index and document filling device base crossmember linear clutch
1663432 Mar. 20, 1928 bookrack base linear clutch
1674359 Jun. 19, 1928 filling device base crossmember linear clutch
1674582 Jun. 19, 1928 bookholder base channel sliding spring loaded
1675269 Sep. 13, 1923 book support shelf partition position stop
1682053 Aug. 28, 1928 book support wraparound weighted
1682060 Aug. 28, 1928 adjustable book holder base crossmember intersliding
1704011 Mar. 5, 1929 book end base scissor
1747496 Feb. 18, 1930 counter partition holder base channel partition sliding
1750575 Mar. 11, 1930 sectional desk accessory base interlock
1750576 Mar. 11, 1930 desk distributor set base interlock
1768379 Jun. 24, 1930 tag and tag holding device base crossmember intersliding
1772438 Aug. 5, 1930 office accessory base interlock
1780872 Nov. 4, 1930 book rack or support base channel position stop
1795526 Mar. 10, 1931 book support standard bookend comered
1806642 May 26, 1931 bookstack shelf partition sliding
1832884 Nov. 24, 1931 shelf follower and end support standard bookend friction block
1853840 Apr. 12, 1932 book shelf base channel partition sliding
1875288 Aug. 30, 1932 adjustable book supporting rack base channel thumbscrew lock
1876346 Sep. 6, 1932 book ends base recoiling strap
1891420 Dec. 20, 1932 book rack base linear clutch
1898533 Feb. 21, 1933 paper file base channel
1912229 May 30, 1933 book end standard bookend hinged
1923996 Aug. 22, 1933 adjustable book end holder base crossmember intersliding
1942456 Jan. 9, 1934 book holder standard bookend book support
1992487 Feb. 26, 1935 combined bookedn & picture frame standard bookend
2031698 Feb. 25, 1936 book end standard bookend
2032086 Feb. 25, 1936 combination lamp stand and book rack base channel sliding spring loaded
2051448 Aug. 18, 1936 adjustable book end holder base crossmember intersliding
2062802 Dec. 1, 1936 display appliance base channel partition position stop
2076941 Apr. 13, 1937 book end and like support base coil
2096634 Oct. 19, 1937 book end base recoiling strap
2104864 Jan. 11, 1938 support for books and the like hanging partition
2111406 Mar. 15, 1938 collapsible portable book rest base fixed hinged
2117667 May 17, 1938 book holder standard bookend book holder
2117668 May 17, 1938 book holder standard bookend book holder
2134606 Oct. 25, 1938 book rack base crossmember partition sliding
2140656 Dec. 20, 1938 book end construction base crossmember sliding spring loaded
2151269 Mar. 21, 1939 display rack for books standard bookend book support
2206133 Jul. 2, 1940 book holder base channel sliding spring loaded
2222190 Nov. 19, 1940 display rack base channel sliding position stop
2264017 Nov. 25, 1941 bookrack base sliding ratchet
2264086 Nov. 25, 1941 book support rack base scissor
2284849 Jun. 2, 1942 book end base recoiling strap
2294595 Sep. 1, 1942 adjustable book rack base crossmember intersliding
2334251 Nov. 16, 1943 book ends standard bookend
2364482 Dec. 5, 1944 book rack base fixed
2368349 Jan. 30, 1945 filing cabinet guide separator base channel partition sliding
2504466 Apr. 18, 1950 adjustable partition base crossmember partition intersliding position stop
2529031 Nov. 7, 1950 book end base crossmember intersliding
2534456 Dec. 19, 1950 self closing bookrack base channel dovetailed sliding spring loaded
2537565 Jan. 9, 1951 book unit rack base partition fixed
2538908 Jan. 23, 1951 shelf divider shelf partition sliding spring lock
2545844 Mar. 20, 1951 automatically adjustable bookrack base crossmember intersliding spring loaded
2566800 Sep. 4, 1951 center extension table base crossmember intersliding
2620929 Dec. 9, 1952 multipurpose book rack base crossmember
2624466 Jan. 6, 1953 bookholder base crossmember intersliding
2652154 Sep. 15, 1953 display rack base channel partition sliding
2658628 Nov. 10, 1953 adjustable shelf divider base partition position stop
2661568 Dec. 8, 1953 book holder standard bookend
2665010 Jan. 5, 1954 bookend base crossmember intersliding
2675922 Apr. 20, 1954 bookrack hanging partition sliding
2684765 Jul. 27, 1954 holder for books and the like base channel linear clutch
2688409 Sep. 7, 1954 adjustable partition for shelves shelf crossmember partition sliding
2726318 Dec. 6, 1955 bookend lamp base crossmember intersliding
2732082 Jan. 24, 1956 bookracks base turning blocks
2738881 Mar. 20, 1956 display and storage holder base recoiling strap
2767856 Oct. 23, 1956 book support standard bookend
2807369 Sep. 24, 1957 support for reading matter standard bookend book support
2845188 Jul. 29, 1958 shelf and divider unit base partition position stop
2872046 Feb. 3, 1959 book ends base interlock
2884139 Apr. 28, 1959 snap-on bin divider shelf partition sliding
2905336 Sep. 22, 1959 partition for filing cabinet rocker compartment shelf partition position stop
2911103 Nov. 3, 1959 device for supporting books base channel spring loaded
2953258 Sep. 20, 1960 detachable self wedging shelf divider hanging partition sliding
2954878 Oct. 4, 1960 display rack base crossmember partition positive lock
2959293 Nov. 8, 1960 record holder base crossmember sliding spring loaded
3063567 Nov. 13, 1962 book rack base crossmember linear
3120894 Feb. 11, 1964 shelving with reversible compressor base channel partition linear
3121494 Feb. 18, 1964 book stop device shelf crossmember intersliding
3126892 Mar. 31, 1964 adjustable partition for files base channel partition sliding positive lock
3138262 Jun. 23, 1964 slotted bookshelf/support base channel linear clutch
3142384 Jul. 28, 1964 adjustable bookshelves/bookends hanging channel partition sliding
3160282 Dec. 8, 1964 vertical shelf unit base channel crossmember position stop
3171542 Mar. 2, 1965 book rack base crossmember partition sliding
3182806 May 11, 1965 book rack base coil
3202290 Aug. 24, 1965 book care system shelf individual depth alignment
3202298 Aug. 24, 1965 bookend hanging partition sliding
3235092 Feb. 15, 1966 book support standard bookend friction bolck
3241683 Mar. 22, 1966 article retainer base channel partition sliding
3269558 Aug. 30, 1966 compartmented shelf device shelf partition position stop
3285429 Nov. 15, 1966 shelf organizer shelf partition sliding
3300057 Jan. 24, 1967 shelf organizer base partition interlock
3301407 Jan. 31, 1967 shelf dividers base channel
3318453 May 9, 1967 reversible file holder base crossmember fixed
3318454 May 9, 1967 shelf with adjustable bookends base channel crossmember
3385450 May 28, 1968 bookend standard bookend anti-tipping
3389805 Jun. 25, 1968 self adjusting telescoping bookends base frictionless spring loaded
3391793 Jul. 9, 1968 book rack base crossmember partition sliding
3399782 Sep. 3, 1968 book ends base recoiling strap
3425565 Feb. 4, 1969 adjustable storage shelf dividing structure base position stop
3450268 Jun. 17, 1969 bookshelf divider & holder hanging partition position lever
3465896 Sep. 9, 1969 bookshelf and book support hanging channel sliding
3489292 Jan. 13, 1970 book support hanging sliding
3513983 May 26, 1970 shelf assembly base channel linear clutch
3579710 May 25, 1971 traversable hardware in driveway base crossmember partition sliding
3601258 Aug. 24, 1971 bookend for shelves shelf sliding
3604564 Jul. 8, 1969 book ends standard bookend magnetic
3679064 Jul. 25, 1972 article holder base crossmember intersliding
3739918 Jun. 19, 1973 cloth bolt holder base crossmember sliding
3747775 Jul. 24, 1973 holder for books and the like base crossmember sliding
3780873 Dec. 25, 1973 automatic display racks base crossmember partition sliding
3780876 Dec. 25, 1973 shelf divider shelf partition sliding
3784021 Jan. 8, 1974 bookrack pivoting interlock
3800958 Apr. 2, 1974 bookrack base crossmember sliding spring loaded
3844415 Oct. 29, 1974 support device for files base crossmember intersliding
3889816 Jun. 17, 1975 book holder and separator hanging partition position stop
3905484 Sep. 16, 1975 flexible dividers for lateral shelf filing shelf partition position stop
3971556 Jul. 27, 1976 combination book end and dumbell apparatus standard bookend weighted
3974918 Aug. 17, 1976 magnetic book supporting structure base channel sliding
4002240 Jan. 11, 1977 combined bookrack and book support base crossmember fixed
4099624 Jul. 11, 1978 portable book rack base crossmember partition position stop
4106735 Aug. 15, 1978 adjustable coil rack base interlock
4113108 Sep. 12, 1978 adjustable book holding device base channel linear clutch
4135626 Jan. 23, 1979 constant force spring expandable clasp holder base recoiling strap
4327838 May 4, 1982 clip-on book end shelf partition sliding
4358019 Nov. 9, 1982 book end base interlock cornered
4410093 Oct. 18, 1983 device for organizing papers and files base position stop
4463854 Aug. 7, 1984 book support assembly base recoiling wire
4569447 Feb. 11, 1986 bookrack base fixed
4595105 Jun. 17, 1986 interlocking bookrack base partition fixed
4606465 Aug. 19, 1986 expansible spring-loaded retention clamp base rolling strap
4637632 Jan. 20, 1987 holding device base interlock
4682696 Jul. 28, 1987 adjustable bookrack base channel thumbscrew lock
4735324 Apr. 5, 1988 removable shelf separator and system base crossmember partition sliding
4742922 May 10, 1988 book rack of selective capacity base interlock
4759449 Jul. 26, 1988 interlocking expandable bookrack base partition position stop
4782960 Nov. 8, 1988 divider with resilient base engagement shelf channel partition sliding
4858774 Aug. 22, 1989 shelving system shelf partition position stop
4944413 Jul. 31, 1990 book support apparatus base partition fixed
5036988 Aug. 6, 1991 bookend for metal shelves standard bookend
5072835 Dec. 17, 1991 tape cartridge holder base partition sliding
5074420 Dec. 24, 1991 free-standing rack assembly base crossmember partition fixed
5103987 Apr. 14, 1992 shelf engaging bookend shelf linear clutch
5121681 Jun. 16, 1992 extendible book shelf base partition crossmember position stop
5183163 Feb. 2, 1993 interlocking continuous base bookends base interlock
5205420 Apr. 27, 1993 adjustable & self locking book rack/support base channel dovetailed linear clutch
5209357 May 11, 1993 hanging bookend device hanging partition sliding
5217122 Jun. 8, 1993 adjustable bookend apparatus hanging sliding spring loaded
5217124 Jun. 8, 1993 clip-on divider shelf device shelf partition sliding
5228578 Jul. 20, 1993 adjustable book shelf base crossmember partition sliding
5275297 Jan. 4, 1994 clip-on book support and label holder shelf partition sliding
5325792 Jul. 5, 1994 bookshelf w/adjustable locking bookends base channel sliding press release
5732832 Mar. 31, 1998 adjustable divider unit to support notebooks shelf partition position stop
5740926 Apr. 21, 1998 bookshelf w/adjustable locking bookends base channel thumbscrew lock
5871104 Feb. 16, 1999 adjustable support apparatus hanging channel spring hinge
6334539 Jun. 1, 2002 bendable bookend standard bookend
6352162 Mar. 5, 2002 interlocking bookends base interlock
6354446 Mar. 12, 2002 space adjustable interlocking crossmember partition interlock
6578717 Jun. 17, 2003 economical desktop bookcase base fixed
base 151 current patents
shelf 41 no proprietary base
hanging 16 linear clutch concept
crossmember 2
wraparound 2
pivoting interlock 1
standard bookend variation 28
241
TABLE 2
Patents for Bookend Utility and Design
Patent Date Title Description
583494 Jun. 1, 1897 book support base channel
1898533 Feb. 21, 1933 paper file base channel
3301407 Jan. 31, 1967 shelf dividers base channel
3318454 May 9, 1967 shelf with adjustable bookends base channel crossmember
3160282 Dec. 8, 1964 vertical shelf unit base channel crossmember position stop
5205420 Apr. 27, 1993 adjustable & self locking book rack/support base channel dovetailed
1237101 Aug. 14, 1917 book holder base channel dovetailed sliding spring loaded
2534456 Dec. 19, 1950 self closing bookrack base channel dovetailed sliding spring loaded
1358853 Nov. 16, 1920 binder tray base channel linear clutch
2684765 Jul. 27, 1954 holder for books and the like base channel linear clutch
3138262 Jun. 23, 1964 slotted bookshelf/support base channel linear clutch
3513983 May 26, 1970 shelf assembly base channel linear clutch
4113108 Sep. 12, 1978 adjustable book holding device base channel linear clutch
1283259 Oct. 29, 1918 ledger rack base channel mechanical
833887 Oct. 23, 1906 book support base channel partition hinged stowed
1489804 Apr. 8, 1924 follow board base channel partition linear
3120894 Feb. 11, 1964 shelving with reversible compressor base channel partition linear
2062802 Dec. 1, 1936 display appliance base channel partition position stop
999974 Aug. 8, 1911 file shelf base channel partition sliding
1747496 Feb. 18, 1930 counter partition holder base channel partition sliding
1853840 Apr. 12, 1932 book shelf base channel partition sliding
2368349 Jan. 30, 1945 filing cabinet guide separator base channel partition sliding
2652154 Sep. 15, 1953 display rack base channel partition sliding
3241683 Mar. 22, 1966 article retainer base channel partition sliding
3126892 Mar. 31, 1964 adjustable partition for files base channel partition sliding positive lock
1780872 Nov. 4, 1930 book rack or support base channel position stop
527897 Oct. 23, 1894 book support base channel sliding
779262 Jan. 3, 1905 tray base channel sliding
1336981 Apr. 13, 1920 book rack base channel sliding
1340317 May 18, 1920 book shelf base channel sliding
1460642 Jul. 3, 1923 book rack base channel sliding
3974918 Aug. 17, 1976 magnetic book supporting structure base channel sliding
2222190 Nov. 19, 1940 display rack base channel sliding position stop
5325792 Jul. 5, 1994 bookshelf w/adjustable locking bookends base channel sliding press release
153227 Jul. 21, 1874 self adjusting book racks base channel sliding spring loaded
670446 Mar. 26, 1901 holding block for cases base channel sliding spring loaded
1674582 Jun. 19, 1928 bookholder base channel sliding spring loaded
2032086 Feb. 25, 1936 combination lamp stand and book rack base channel sliding spring loaded
2206133 Jul. 2, 1940 book holder base channel sliding spring loaded
497993 May 23, 1893 automatic file holder base channel spring loaded
2911103 Nov. 3, 1959 device for supporting books base channel spring loaded
525186 Aug. 28, 1894 knockdown rack base channel thumbscrew lock
1875288 Aug. 30, 1932 adjustable book supporting rack base channel thumbscrew lock
4682696 Jul. 28, 1987 adjustable bookrack base channel thumbscrew lock
5740926 Apr. 21, 1998 bookshelf w/adjustable locking bookends base channel thumbscrew lock
2076941 Apr. 13, 1937 book end and like support base coil
3182806 May 11, 1965 book rack base coil
2620929 Dec. 9, 1952 multipurpose book rack base crossmember
3318453 May 9, 1967 reversible file holder base crossmember fixed
4002240 Jan. 11, 1977 combined bookrack and book support base crossmember fixed
489693 Jan. 10, 1893 adjustable book rack base crossmember intersliding
945877 Jan. 11, 1910 desk book rack base crossmember intersliding
1006328 Oct. 17, 1911 cigar rack base crossmember intersliding
1317550 Sep. 30, 1919 book rack base crossmember intersliding
1682060 Aug. 28, 1928 adjustable book holder base crossmember intersliding
1768379 Jun. 24, 1930 tag and tag holding device base crossmember intersliding
1923996 Aug. 22, 1933 adjustable book end holder base crossmember intersliding
2051448 Aug. 18, 1936 adjustable book end holder base crossmember intersliding
2294595 Sep. 1, 1942 adjustable book rack base crossmember intersliding
2529031 Nov. 7, 1950 book end base crossmember intersliding
2566800 Sep. 4, 1951 center extension table base crossmember intersliding
2624466 Jan. 6, 1953 bookholder base crossmember intersliding
2665010 Jan. 5, 1954 bookend base crossmember intersliding
2726318 Dec. 6, 1955 bookend lamp base crossmember intersliding
3679064 Jul. 25, 1972 article holder base crossmember intersliding
3844415 Oct. 29, 1974 support device for files base crossmember intersliding
1022150 Apr. 2, 1912 book rack base crossmember intersliding hinged
2545844 Mar. 20, 1951 automatically adjustable bookrack base crossmember intersliding spring loaded
1660823 Feb. 28, 1928 card index and document filing device base crossmember linear clutch
1674359 Jun. 19, 1928 filing device base crossmember linear clutch
3063567 Nov. 13, 1962 book rack base crossmember linear clutch
5074420 Dec. 24, 1991 free-standing rack assembly base crossmember partition fixed
2504466 Apr. 18, 1950 adjustable partition base crossmember partition intersliding position stop
1363138 Dec. 21, 1920 bookrack base crossmember partition intersliding
4099624 Jul. 11, 1978 portable book rack base crossmember partition position stop
2954878 Oct. 4, 1960 display rack base crossmember partition positive lock
518573 Apr. 17, 1894 book rack base crossmember partition sliding
1049726 Jan. 7, 1913 display rack base crossmember partition sliding
2134606 Oct. 25, 1938 book rack base crossmember partition sliding
3171542 Mar. 2, 1965 book rack base crossmember partition sliding
3391793 Jul. 9, 1968 book rack base crossmember partition sliding
3579710 May 25, 1971 traversable hardware in driveway base crossmember partition sliding
3780873 Dec. 25, 1973 automatic display racks base crossmember partition sliding
4735324 Apr. 5, 1988 removable shelf separator and system base crossmember partition sliding
5228578 Jul. 20, 1993 adjustable book shelf base crossmember partition sliding
538500 Apr. 30, 1895 document file base crossmember positive lock
3739918 Jun. 19, 1973 cloth bolt holder base crossmember sliding
3747775 Jul. 24, 1973 holder for books and the like base crossmember sliding
2140656 Dec. 20, 1938 book end construction base crossmember sliding spring loaded
2959293 Nov. 8, 1960 record holder base crossmember sliding spring loaded
3800958 Apr. 2, 1974 bookrack base crossmember sliding spring loaded
934148 Sep. 14, 1909 book rest base fixed
1379766 May 31, 1921 portable book holder base fixed
1477634 Dec. 18, 1923 shipping case and display rack base fixed
2364482 Dec. 5, 1944 book rack base fixed
4569447 Feb. 11, 1986 book rack base fixed
6578717 Jun. 17, 2003 economical desktop bookcase base fixed
158751 Jan. 12, 1875 book racks base fixed hinged
470050 Mar. 1, 1892 letter file base fixed hinged
2111406 Mar. 15, 1938 collapsible portable book rest base fixed hinged
3389805 Jun. 25, 1968 self adjusting telescoping bookends base frictionless spring loaded
1750575 Mar. 11, 1930 sectional desk accessory base interlock
1750576 Mar. 11, 1930 desk distributor set base interlock
1772438 Aug. 5, 1930 office accessory base interlock
2872046 Feb. 3, 1959 book ends base interlock
4106735 Aug. 15, 1978 adjustable coil rack base interlock
4637632 Jan. 20, 1987 holding device base interlock
4742922 May 10, 1988 book rack of selective capacity base interlock
5183163 Feb. 2, 1993 interlocking continuous base bookends base interlock
6352162 Mar. 5, 2002 interlocking bookends base interlock
4358019 Nov. 9, 1982 book end base interlock cornered
1663432 Mar. 20, 1928 bookrack base linear clutch
1891420 Dec. 20, 1932 book rack base linear clutch
5121681 Jun. 16, 1992 extendible book shelf base partition crossmember position stop
2537565 Jan. 9, 1951 book unit rack base partition fixed
4595105 Jun. 17, 1986 interlocking bookrack base partition fixed
4944413 Jul. 31, 1990 book support apparatus base partition fixed
793364 Jun. 27, 1905 book & paper rack base partition interlock
3300057 Jan. 24, 1967 shelf organizer base partition interlock
386674 Jul. 24, 1888 paper or bill file base partition position stop
423647 Mar 18, 1890 bill file base partition position stop
451729 May 5, 1891 paper or bill file base partition position stop
593758 Nov. 16, 1897 portable book rack base partition position stop
1257528 Feb. 26, 1918 file rack base partition position stop
1415110 May 9, 1922 file rack base partition position stop
1562275 Nov. 7, 1925 book supporting device base partition position stop
2658628 Nov. 10, 1953 adjustable shelf divider base partition position stop
2845188 Jul. 29, 1958 shelf and divider unit base partition position stop
4759449 Jul. 26, 1988 interlocking expandable bookrack base partition position stop
5072835 Dec. 17, 1991 tape cartridge holder base partition sliding
431373 Jul. 1, 1890 book and paper rack base position stop
774984 Nov. 15, 1904 book support base position stop
931362 Aug. 17, 1909 movable partition or book support base position stop
1621410 Mar. 15, 1927 supporting rack base position stop
3425565 Feb. 4, 1969 adjustable storage shelf dividing structure base position stop
4410093 Oct. 18, 1983 device for organizing papers and files base position stop
1401171 Dec. 27, 1921 binder rack base position stop roller
1395825 Nov. 1, 1921 clamping device base recoiling strap
1876346 Sep. 6, 1932 book ends base recoiling strap
2096634 Oct. 19, 1937 book end base recoiling strap
2284849 Jun. 2, 1942 book end base recoiling strap
2738881 Mar. 20, 1956 display and storage holder base recoiling strap
3399782 Sep. 3, 1968 book ends base recoiling strap
4135626 Jan. 23, 1979 constant force spring expandable clasp holder base recoiling strap
4463854 Aug. 7, 1984 book support assembly base recoiling wire
4606465 Aug. 19, 1986 expansible spring-loaded retention clamp base rolling strap
1704011 Mar. 5, 1929 book end base scissor
2264086 Nov. 25, 1941 book support rack base scissor
174262 Feb. 29, 1876 book rack base sliding hinged
2264017 Nov. 25, 1941 bookrack base sliding ratchet
2732082 Jan. 24, 1956 bookracks base turning blocks
6354446 Mar. 12, 2002 space adjustable interlocking crossmember partition interlock
758868 May 3, 1904 book support crossmember partition position stop
3142384 Jul. 28, 1964 adjustable bookshelves/bookends hanging channel partition sliding
3465896 Sep. 9, 1969 bookshelf and book support hanging channel sliding
5871104 Feb. 16, 1999 adjustable support apparatus hanging channel spring hinge
575832 Jan. 26, 1897 book support hanging partition
2104864 Jan. 11, 1938 support for books and the like hanging partition
560851 May 26, 1896 book support
481505 Aug. 23, 1892 book support hanging partition position lever
3450268 Jun. 17, 1969 bookshelf divider & holder hanging partition position lever
3889816 Jun. 17, 1975 book holder and separator hanging partition position stop
2675922 Apr. 20, 1954 bookrack hanging partition sliding
2953258 Sep. 20, 1960 detachable self wedging shelf divider hanging partition sliding
3202298 Aug. 24, 1965 bookend hanging partition sliding
5209357 May 11, 1993 hanging bookend device hanging partition sliding
935560 Sep. 28, 1909 book support hanging sliding
3489292 Jan. 13, 1970 book support hanging sliding
5217122 Jun. 8, 1993 adjustable bookend apparatus hanging sliding spring loaded
3784021 Jan. 8, 1974 bookrack pivoting interlock
4782960 Nov. 8, 1988 divider with resilient base engagement shelf channel partition sliding
436704 Sep. 16, 1890 book support shelf channel positive lock
3121494 Feb. 18, 1964 book stop device shelf crossmember intersliding
1506204 Aug. 26, 1924 library book support & index shelf crossmember partition fixed
660264 Oct. 23, 1900 divisible shelf shelf crossmember partition position stop
2688409 Sep. 7, 1954 adjustable partition for shelves shelf crossmember partition sliding
3202290 Aug. 24, 1965 book care system shelf individual depth alignment
5103987 Apr. 14, 1992 shelf engaging bookend
657847 Sep. 11, 1900 book case or rack shelf partition position lever
712936 Nov. 4, 1902 book holder shelf partition position stop
1508610 Sep. 16, 1924 shelving shelf partition position stop
1675269 Sep. 13, 1923 book support shelf partition position stop
2905336 Sep. 22, 1959 partition for filling cabinet rocker compartment shelf partition position stop
3269558 Aug. 30, 1966 compartmented shelf device shelf partition position stop
3905484 Sep. 16, 1975 flexible dividers for lateral shelf filling shelf partition position stop
4858774 Aug. 22, 1989 shelving system shelf partition position stop
5732832 Mar. 31, 1998 adjustable divider unit to support notebooks shelf partition position stop
161293 Mar. 23, 1875 book support shelf partition positive lock
575294 Jan. 12, 1897 book support & label holder shelf partition sliding
679054 Jul. 23, 1901 shelf book support shelf partition sliding
767037 Aug. 9, 1904 shelf book support shelf partition sliding
1806642 May 26, 1931 bookstack shelf partition sliding
2884139 Apr. 28, 1959 snap-on bin divider shelf partition sliding
3285429 Nov. 15, 1966 shelf organizer shelf partition sliding
3780876 Dec. 25, 1973 shelf divider shelf partition sliding
4327838 May 4, 1982 clip-on book end shelf partition sliding
5217124 Jun. 8, 1993 clip-on divider shelf device shelf partition sliding
5275297 Jan. 4, 1994 clip-on book support and label holder shelf partition sliding
2538908 Jan. 23, 1951 shelf divider shelf partition sliding spring lock
903769 Nov. 10, 1908 book support and adjustable shelf partition shelf partition thumbscrew lock
668961 Feb. 26, 1901 book rack shelf scissor filler
608515 Aug. 22, 1898 book support shelf scissor side filler
314437 Mar. 24, 1885 book holder shelf side filler
348382 Aug. 31, 1886 book holder shelf side filler
305863 Sep. 30, 1884 book suppport shelf sliding
355511 Jan. 4, 1887 book support shelf sliding
388674 Aug. 28, 1888 book support for shelves shelf sliding
504233 Aug. 29, 1893 book support shelf sliding
781890 Feb. 7, 1905 book supporter shelf sliding
3601258 Aug. 24, 1971 bookend for shelves shelf sliding
452673 May 19, 1891 book support shelf sliding hinged linear clutch
202959 Apr. 30, 1878 book supports standard bookend
502321 Aug. 1, 1893 adjustable shelf partition standard bookend
850977 Apr. 23, 1907 book support standard bookend
1370279 Mar. 1, 1921 folding book stop standard bookend
1409136 Mar. 7, 1922 book end standard bookend
1557419 Oct. 13, 1925 book end standard bookend
1992487 Feb. 26, 1935 combined bookedn & picture frame standard bookend
2031698 Feb. 25, 1936 book end standard bookend
2334251 Nov. 16, 1943 book ends standard bookend
2661568 Dec. 8, 1953 book holder standard bookend
2767856 Oct. 23, 1956 book support standard bookend
5036988 Aug. 6, 1991 bookend for metal shelves standard bookend
6334539 Jun. 1, 2002 bendable bookend standard bookend
1598467 Aug. 31, 1926 book support standard bookend (Weeks)
3385450 May 28, 1968 bookend standard bookend anti-tipping
2117667 May 17, 1938 book holder standard bookend book holder
2117668 May 17, 1938 book holder standard bookend book holder
1942456 Jan. 9, 1934 book holder standard bookend book support
2151269 Mar. 21, 1939 display rack for books standard bookend book support
2807369 Sep. 24, 1957 support for reading matter standard bookend book support
1795526 Mar. 10, 1931 book support standard bookend comered
1832884 Nov. 24, 1931 shelf follower and end support standard bookend friction block
3235092 Feb. 15, 1966 book support standard bookend friction block
1912229 May 30, 1933 book end standard bookend hinged
186974 Feb. 6, 1877 book support standard bookend interlocking partition
3604564 Jul. 8, 1969 book ends standard bookend magnetic
1396910 Nov. 15, 1921 book frame and label holder standard bookend shelf
3971556 Jul. 27, 1976 combination book end and dumbell apparatus standard bookend weighted
314436 Mar. 24, 1885 book holder wraparound rigid
1682053 Aug. 28, 1928 book support wraparound weighted
base 151 current patents
shelf 41 no proprietary base
hanging 16 linear clutch concept
crossmember 2
wraparound 2
pivoting interlock 1
standard bookend variation 28
241
TABLE 3
Functional Descriptions
Description
base channel
base channel crossmember
base channel crossmember position stop
base channel dovetailed sliding spring loaded
base channel mechanical
base channel partition hinged stowed
base channel partition position stop
base channel partition sliding
base channel partition sliding positive lock
base channel position stop
base channel sliding
base channel sliding position stop
base channel sliding press release
base channel sliding spring loaded
base channel spring loaded
base channel thumbscrew lock
base coil
base crossmember
base crossmember fixed
base crossmember intersliding
base crossmember intersliding hinged
base crossmember intersliding spring loaded
base crossmember linear clutch
base crossmember partition fixed
base crossmember partition intersliding position stop
base crossmember partition linear clutch
base crossmember partition position stop
base crossmember partition positive lock
base crossmember partition sliding
base crossmember positive lock
base crossmember sliding
base crossmember sliding spring loaded
base fixed
base fixed hinged
base frictionless spring loaded
base interlock
base interlock cornered
base linear clutch
base partition crossmember position stop
base partition fixed
base partition interlock
base partition position stop
base partition sliding
base position stop
base position stop roller
base recoiling strap
base recoiling wire
base rolling strap
base scissor
base sliding hinged
base sliding ratchet
base turning blocks
crossmember partition interlock
crossmember partition position stop
hanging channel partition sliding
hanging channel sliding
hanging channel spring hinge
hanging partition
hanging partition position stop
hanging partition sliding
hanging sliding
hanging sliding spring loaded
pivoting interlock
shelf channel partition sliding
shelf crossmember intersliding
shelf crossmember partition fixed
shelf crossmember partition position stop
shelf crossmember partition sliding
shelf individual depth alignment
shelf linear cluctch
shelf partition position lever
shelf partition position stop
shelf partition sliding
shelf partition sliding spring lock
shelf partition thumbscrew lock
shelf scissor filler
shelf scissor side, filler
shelf side filler
shelf sliding
shelf sliding hinged linear clutch
standard bookend (Weeks)
standard bookend anti-tipping
standard bookend book support
standard bookend cornered
standard bookend friction block
standard bookend interlocking partition
standard bookend magnetic
standard bookend shelf
standard bookend weighted
wraparound rigid
wraparound weighted
TABLE 4
Functional Descriptors
Description Echelon 1 Echelon 2 Echelon 3 Echelon 4 Echelon 5 Reference
base channel crossmember position stop base channel crossmember position stop 3160282
base channel dovetailed linear clutch dovetailed linear clutch 5205420
base channel dovetailed sliding spring loaded sliding spring loaded 1237101
base channel linear clutch linear clutch 1358853
base channel mechanical mechanical 1283259
base channel partition hinged stowed partition hinged stowed 833887
base channel partition linear clutch linear clutch 1489804
base channel partition position stop position stop 2062802
base channel partition sliding positive lock sliding positive lock 3126892
base channel position stop position stop 1780872
base channel sliding position stop sliding position stop 2222190
base channel sliding press release press release 5325792
base channel sliding spring loaded spring loaded 153227
base channel spring loaded spring loaded 497993
base channel thumbscrew lock thumbscrew lock 525186
base coil coil 2076941
base crossmember fixed crossmember fixed 3318453
base crossmember intersliding hinged intersliding hinged 1022150
base crossmember intersliding spring loaded spring loaded 2545844
base crossmember linear clutch linear clutch 1660823
base crossmember partition fixed partition fixed 5074420
base crossmember partition intersliding position stop intersliding position stop 2504466
base crossmember partition linear clutch linear clutch 1363138
base crossmember partition position stop position stop 4099624
base crossmember partition positive lock positive lock 2954878
base crossmember partition sliding sliding 518573
base crossmember positive lock positive lock 538500
base crossmember sliding spring loaded sliding spring loaded 2140656
base fixed hinged fixed hinged 158751
base frictionless spring loaded frictionless spring loaded 3389805
base interlock cornered interlock cornered 4358019
base linear clutch linear clutch 1663432
base partition crossmember position stop partition crossmember position stop 5121681
base partition fixed fixed 2537565
base partition interlock interlock 3300057
base partition position stop position stop 423647
base partition sliding sliding 5072835
base position stop roller position stop roller 1401171
base recoiling strap recoiling strap 1395825
base recoiling wire wire 4463854
base rolling strap rolling strap 4606465
base scissor scissor 1704011
base sliding hinged sliding hinged 174262
base sliding ratchet ratchet 2264017
base turning blocks turning blocks 2732082
crossmember partition interlock crossmember partition interlock 6354446
crossmember partition position stop position stop 758868
hanging channel partition sliding hanging channel partition sliding 3142384
hanging channel sliding sliding 3465896
hanging channel spring hinge spring hinge 5871104
hanging partition linear clutch partition linear clutch 560851
hanging partition position stop position stop 3889816
hanging partition sliding sliding 2675922
hanging sliding spring loaded sliding spring loaded 5217122
plvoting interlock pivoting interlock 3784021
shelf channel partition sliding shelf channel partition sliding 4782960
shelf crossmember intersliding crossmember intersliding 3121494
shelf crossmember partition fixed partition fixed 1506204
shelf crossmember partition position stop position stop 660264
shelf crossmember partition sliding sliding 1506204
shelf individual depth alignment individual depth 3202290
shelf linear clutch linear clutch 5103987
shelf partition position lever partition position lever 657847
shelf partition position stop position stop 712936
shelf partition sliding spring lock sliding spring lock 767037
shelf partition thumbscrew lock thumbscrew lock 903769
shelf scissor filler scissor filler 668961
shelf scissor side filler side filler 608515
shelf side filler side filler 314437
shelf sliding linear clutch hinged sliding linear clutch hinged 305863
standard bookend standard bookend variation 202959
wraparound rigid wraparound rigid 314436
wraparound weighted weighted 1682053
base 45
shelf 15
hanging 7
crossmember 2
wraparound 2
plvoting interlock 1
standard bookend variation 1
73
date activity OPR
26-Aug-03 completed first design and prototype Rivers
2-Oct-03 disclosed invention (Reed Sawyer witness) AIF
6-Oct-03 disclosure filed USPTO
8-Oct-03 paid for preliminary appraisal AIF
15-Oct-03 paid for preliminary search Rivers
17-Oct-03 completed circular design Rivers
10-Nov-03 received letter of expectation AIF
13-Nov-03 completed preliminary search results AIF
21-Nov-03 submitted initial description to AIF Rivers
24-Nov-03 letter acknowledging initial submission AIF
12-Dec-03 submitted additional description Rivers
5-Jan-04 returned first draft of application AIF
12-Jan-04 submitted review of draft application to AIF Rivers
2-Feb-04 visited AIF & requested status Rivers
6-Feb-04 AIF quoted $313.00 for changes AIF
12-Feb-04 re-submitted review of draft application to AIF Rivers
30-Mar-04 visited AIF & requested status Rivers
31-Mar-04 received phone call from AIF AIF
22-Apr-04 returned second draft of application AIF
# Nomenclature Width Height Thickness Depth Diameter Disclosure Nomenclature
10 Adjustable Width Bookend Construction Tabletop Bookshelf
20 Bookend Member (left or right) Bookend
21 Vertically Oriented Rear Wall Panel 4 8 ¾ Back Plate
22 Vertically Oriented Side Wall 7¼ 8 ¾ End Plate
23 Inwardly Projecting Support Member 5/16 Peg, End Stop, Stop Post
24 Elongated Slot ¾ 3¼ ¾ Notch
30 Spanner Unit
31 Cross-Member 2½ ¾ Cross-Member
32 End Cap Member End Cap
33 End Plate 2½ 4 ¾
34 Lower Support Leg 1¼ ¾ ¾
35 Capture Arm 1¼ ¾ ¾
36 Inwardly Facing Groove ¼
40 Holding Block Holding Block
41 Rear Block 7 2 1½
42 Base Mat 7 1/16 12 Base Mat
43 Attaching Member 7 ¾ ¾
Patent Date Title Concept
1 355511 Jan. 4, 1887 book support base with shelf sliders
2 497993 May 23, 1893 automatic file holder base channel linear clutch spring loaded
3 518573 Apr. 17, 1894 book rack base crossmember with sliding partition
4 527897 Oct. 23, 1894 book support base channel with spring linear clutch
5 583494 Jun. 1, 1897 book support base channel
6 931362 Aug. 17, 1909 movable partition or book support base position locks
7 945877 Jan. 11, 1910 desk book rack base intersliding crossmember
8 1237101 Aug. 14, 1917 book holder base channel dovetalled linear clutch spring loaded
9 1317550 Sep. 30, 1919 book rack base intersliding crossmember
10 1336981 Apr. 13, 1920 book rack base channel sliding friction
11 1363138 Dec. 21, 1920 bookrack base crossmember with sliding lever lock
12 1379766 May 31, 1921 portable book holder base with fixed sides
13 1675269 Sep. 13, 1923 book suppot shelves with position lock partitions
14 1598467 Aug. 31, 1926 book support standard bookend
15 1663432 Mar. 20, 1928 bookrack base linear clutch
16 1674359 Jun. 19, 1928 filing device base crossmember with linear clutch
17 1674582 Jun. 19, 1928 bookholder base channel with spring-loaded slide
18 1682060 Aug. 28, 1928 adjustable book holder base intersliding crossmember
19 1750575 Mar. 11, 1930 sectional desk accessory base interlock
20 1750576 Mar. 11, 1930 desk distributor set base interlock
21 1768379 Jun. 24, 1930 tag and tag holding device base sliding plate
22 1772438 Aug. 5, 1930 office accessory base interlock
23 1780872 Nov. 4, 1930 book rack or support base channel with positive stops
24 1898533 Feb. 21, 1933 paper file base channel
25 2032086 Feb. 25, 1936 combination lamp stand and book rack base sliding plate spring loaded
26 2134606 Oct. 25, 1938 book rack base crossmember with sliding partition
27 2140656 Dec. 20, 1938 book end construction base crossmember sliding plates spring loaded
28 2206133 Jul. 2, 1940 book holder base channel with linear clutch spring loaded
29 2264017 Nov. 25, 1941 bookrack base ratchet lock
30 2294595 Sep. 1, 1942 adjustable book rack base intersliding crosmembers
31 2545844 Mar. 20, 1951 automatically adjustable bookrack base spring-loaded intersliding crossmember
32 2620929 Dec. 9, 1952 multipurpose book rack base crossmember
33 2684765 Jul. 27, 1954 holder for books and the like base channel with linear clutch
34 2911103 Nov. 3, 1959 device for supporting books base spring-loaded channel
35 3063567 Nov. 13, 1962 book rack base crossmember with linear clutch
36 3126892 Mar. 31, 1964 adjustable partition for files base channel with friction slide partitions
37 3138262 Jun. 23, 1964 slotted bookshelf/support base channel with linear clutch
38 3142384 Jul. 28, 1964 adjustable bookshelves/bookends hanging channel with sliding partitions
39 3202298 Aug. 24, 1965 bookend hanging channel with sliding partitions
40 3301407 Jan. 31, 1967 shelf dividers base channel
41 3318454 May 9, 1967 shelf with adjustable bookends base channel with crossmember
42 3389805 Jun. 25, 1968 self adjusting telescoping bookends base spring-loaded slide
43 3425565 Feb. 4, 1969 adjustable storage shelf dividing structure base positions lock
44 D241295 Sep. 7, 1976 base channel
45 4113108 Sep. 12, 1978 adjustable book holding device base channel with sliding friction
46 4682696 Jul. 28, 1987 adjustable bookrack base channel with thumbscrew lock
47 5103987 Apr. 14, 1992 shelf engaging bookend
48 5183163 Feb. 2, 1993 interlocking continuous base bookends base interlock
49 5205420 Apr. 27, 1993 adjustable & self locking book rack/support base channel dovetalled linear clutch
50 5228578 Jul. 20, 1993 adjustable book shelf base crossmember with partitions
51 5325792 Jul. 5, 1994 bookshelf w/adjustable locking bookends base channel with positive lock
52 5740926 Apr. 21, 1998 bookshelf w/adjustable locking bookends base channel with thumbscrew lock
53 5871104 Feb. 16, 1999 adjustable support apparatus channel and spring hinge
54 6352162 Mar. 5, 2002 interlocking bookends base interlock
current patents obtained from Denver Library
current patents
no proprietary base