Retaining wall block
Latest Keystone Retaining Wall Systems Patents:
Description
FIG. 1 is an isometric view of the retaining wall block of the present invention showing the front, left, and bottom faces.
FIG. 2 is an isometric view of the retaining wall block depicted in FIG. 1 showing the top, rear, and left faces.
FIG. 3 is an top plan view of the retaining wall block depicted in FIG. 1.
FIG. 4 is an bottom plan view of the retaining wall block depicted in FIG. 1.
FIG. 5 is an elevational front view of the retaining wall block depicted in FIG. 1.
FIG. 6 is an elevational side view of the retaining wall block depicted in FIG. 1, the opposite side being a mirror image thereof; and,
FIG. 7 is an elevational rear view of the retaining wall block depicted in FIG. 1.
Referenced Cited
U.S. Patent Documents
Other references
D411315 | June 22, 1999 | Bott |
4229123 | October 21, 1980 | Heinzmann |
5161918 | November 10, 1992 | Hodel |
5505034 | April 9, 1996 | Dueck |
5791827 | August 11, 1998 | Arvai et al. |
5865066 | February 2, 1999 | Dawson |
- "consolidation procedures", figs. 3.2.1 and 3.2.2, p. 46 of Architectural Precast Concrete by the Prestressed Concrete Insistitute, Chicago Ill, 1973. Diamond Wall System, American Masonry Products broshure. patent shoe , 1989 .
Patent History
Patent number: D430308
Type: Grant
Filed: Nov 19, 1998
Date of Patent: Aug 29, 2000
Assignee: Keystone Retaining Wall Systems (Edina, MN)
Inventor: William B. Dawson (Maple Grove, MN)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Robert A. Delehanty
Law Firm: Dorsey & Whitney LLP
Application Number: 0/96,772
Type: Grant
Filed: Nov 19, 1998
Date of Patent: Aug 29, 2000
Assignee: Keystone Retaining Wall Systems (Edina, MN)
Inventor: William B. Dawson (Maple Grove, MN)
Primary Examiner: Louis S. Zarfas
Assistant Examiner: Robert A. Delehanty
Law Firm: Dorsey & Whitney LLP
Application Number: 0/96,772
Classifications
Current U.S. Class:
Construction Block Or Brick Type (17) (D25/113)
International Classification: 2501;
International Classification: 2501;