|
The ornamental design for a construction block, as shown. |
FIG. 1 is a perspective view of the construction block showing my new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a sectional view taken along the line 6--6 of FIG. 3; and
FIG. 7 is a sectional view taken along the line 7--7 of FIG. 2.
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Sep 15 1986 | FORSBERG, PAUL J | KEYSTONE RETAINING WALL SYSTEMS, INC , A CORP OF MINNESOTA | ASSIGNMENT OF ASSIGNORS INTEREST | 004648 | /0846 | |
Sep 18 1986 | Keystone Retaining Wall Systems, Inc. | (assignment on the face of the patent) | / | |||
Sep 15 1997 | KEYSTONE RETAINING WALL SYSTEMS, INC | U S BANK NATIONAL ASSOCIATION | SECURITY AGREEMENT | 008732 | /0302 | |
Dec 21 1999 | U S BANK NATIONAL ASSOCIATION | KEYSTONE RETAINING WALL SYSTEMS, INC | RELEASE BY SECURED PARTY SEE DOCUMENT FOR DETAILS | 011238 | /0432 |
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