Retaining wall block
Latest Keystone Retaining Wall Systems, Inc. Patents:
FIG. 1 is a top front perspective view of a retaining wall block of my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a side view of the right side thereof, the opposite side being a mirror image thereof;
FIG. 4 is a sectional view taken along the line 4--4 of FIG. 3;
FIG. 5 is a bottom view thereof;
FIG. 6 is a front elevational thereof;
FIG. 7 is a rear elevational view thereof;
FIG. 8 is a sectional view taken along the line 8--8 of FIG. 2;
FIG. 9 is a top front perspective view of a first modification of the retaining wall block of my new design;
FIG. 10 is a top plan view of FIG. 9;
FIG. 11 is a side view of right side of FIG. 10, the opposite side being a mirror image thereof;
FIG. 12 is a sectional view taken along the line 12--12 of FIG. 10;
FIG. 13 is a bottom view of FIG. 9;
FIG. 14 is a front elevational view of FIG. 9;
FIG. 15 is a rear elevational view of FIG. 9; and
FIG. 16 is a sectional view taken along the line 16--16 of FIG. 10.
D237704 | November 1975 | Lane |
566924 | September 1896 | Morrin |
2882689 | April 1959 | Huch et al. |
3995434 | December 7, 1976 | Kato et al. |
4016693 | April 12, 1977 | Warren |
4312606 | January 26, 1982 | Sarikelle |
4496226 | January 29, 1985 | Ruckstuhl |
1360872 | November 1964 | FRX |
205452 | March 1939 | CHX |
336 | 1871 | GBX |
1385207 | August 1975 | GBX |
2127872A | July 1984 | GBX |
- Concrete Masonry Pictorial, vol. 33, No. 3 C 1977, p. 35.
Type: Grant
Filed: Jun 8, 1987
Date of Patent: Nov 8, 1988
Assignee: Keystone Retaining Wall Systems, Inc. (Edina, MN)
Inventor: Paul J. Forsberg (Richfield, MN)
Primary Examiner: A. Hugo Word
Law Firm: Burd, Bartz & Gutenkauf
Application Number: 7/59,481