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I claim the ornamental design for a column forming block, as shown.
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FIG. 1 is a perspective view of a column forming block showing my new design.
FIG. 2 is another perspective view thereof.
FIG. 3 is a front view thereof.
FIG. 4 is a side view thereof.
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The broken lines appearing in the figures are not intended to form part of the claimed design and are provided for illustrative purposes only.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Mar 08 2006 | PRICE, BRIAN A | Rockwood Retaining Walls Inc | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 017538 | /0298 | |
| Mar 17 2006 | Rockwood Retaining Walls, Inc. | (assignment on the face of the patent) | / | |||
| Feb 06 2007 | Rockwood Retaining Walls, Inc | Mortarless Technologies LLC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 019116 | /0834 | |
| Jun 25 2009 | Mortarless Technologies LLC | HOME FEDERAL SAVINGS BANK | SECURITY AGREEMENT | 022902 | /0555 |
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