Convertible chair ladder
Description
FIG. 1 is a front perspective view of a convertible chair ladder, in chair mode, showing our new design;
FIG. 2 is a front elevation thereof;
FIG. 3 is a rear elevation thereof;
FIG. 4 is an elevation of one side thereof, the opposite side elevation being a mirror image;
FIG. 5 is a top plan thereof;
FIG. 6 is a bottom plan thereof;
FIG. 7 is a front perspective view thereof in ladder mode;
FIG. 8 is a front elevation thereof;
FIG. 9 is an elevation of one side thereof, the opposite side being a mirror image;
FIG. 10 is a rear elevation thereof;
FIG. 11 is a top plan thereof; and,
FIG. 12 is a bottom plan thereof.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
D23739 | October 1894 | Herhold |
D111670 | October 1938 | Sunquist et al. |
D153488 | April 1949 | Balavny |
D161792 | January 1951 | Schilling |
D353720 | December 27, 1994 | Ward |
371128 | October 1887 | Dudley |
910818 | January 1909 | Hook |
2291996 | August 1942 | Tucker |
513850 | November 1920 | FRX |
- Hasluck Woodworking, .COPYRGT.1907, pp. 525 & 526, Chair at bottom right and chair at top left, respectively. Popular Mechanics, Feb. 1952, p. 205, chair in center of page.
Patent History
Patent number: D369684
Type: Grant
Filed: Jul 17, 1995
Date of Patent: May 14, 1996
Inventors: John J. Engel (Ripon, CA), Robert W. Kammerer (Wilton, CA)
Primary Examiner: Gary D. Watson
Law Firm: Lothrop & West
Application Number: 0/41,481
Type: Grant
Filed: Jul 17, 1995
Date of Patent: May 14, 1996
Inventors: John J. Engel (Ripon, CA), Robert W. Kammerer (Wilton, CA)
Primary Examiner: Gary D. Watson
Law Firm: Lothrop & West
Application Number: 0/41,481
Classifications
Current U.S. Class:
D/6335