Modular block wall

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of a modular block wall showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a side view of the left side thereof, the opposite side being a mirror image thereof; and

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D237704 November 1975 Lane
2882689 April 1959 Huch et al.
4014693 March 29, 1977 Warren
4312606 January 26, 1982 Sarikells
4496266 January 29, 1985 Ruckstuahl
4658541 April 21, 1987 Haile
Foreign Patent Documents
1360872 April 1964 FRX
336 1871 GBX
2127872 April 1984 GBX
Patent History
Patent number: D299067
Type: Grant
Filed: Apr 2, 1987
Date of Patent: Dec 20, 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: 7/33,178