Convex block
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FIG. 1 is a perspective view of a first embodiment of the convex block of my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof, the bottom view being a mirror image thereof;
FIG. 4 is an end view thereof, the opposite end being a mirror image thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a front perspective view of a second embodiment of the convex block of my new design;
FIG. 7 is a front elevational view of FIG. 6;
FIG. 8 is a top plan view of FIG. 6, the bottom view being a mirror image thereof;
FIG. 9 is an end view of FIG. 6, the opposite end being a mirror image thereof;
FIG. 10 is a rear view of FIG. 6;
FIG. 11 is a perspective view of a third embodiment of the convex block of my new design;
FIG. 12 is a front view of FIG. 11;
FIG. 13 is a top view of FIG. 11, the bottom view being a mirror image thereof;
FIG. 14 is an end view of FIG. 11, the opposite end being a mirror image thereof;
FIG. 15 is a rear view of FIG. 11;
FIG. 16 is a front perspective view of a fourth embodiment of the convex block of my new design;
FIG. 17 is a front view of FIG. 16;
FIG. 18 is a top view of FIG. 16, the bottom view being the mirror image thereof;
FIG. 19 is an end view of FIG. 16, the opposite end being a mirror image thereof; and
FIG. 20 is a rear view of FIG. 16.
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Type: Grant
Filed: May 14, 1986
Date of Patent: May 9, 1989
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: 6/863,399