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The ornamental design for a four cavity building block, as shown and described. |
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FIG. 1 is a perspective view of a four cavity building block showing our new design.
FIG. 2 is an end elevational view thereof, the other end being a mirror image thereof.
FIG. 3 is a top plan view thereof.
FIG. 4 is a side elevational view thereof, the other side being a mirror image thereof.
FIG. 5 is a bottom plan view thereof.
VanWassehnova, Emerson J., Sagar, Percy K.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Feb 10 1987 | VAN WASSEHNOVA, EMERSON J | STEARNS-BLOCK EQUIPMENT COMPANY, INC , A CORP OF DE | ASSIGNMENT OF ASSIGNORS INTEREST | 004669 | /0558 | |
| Feb 10 1987 | SAGAR, PERCY K | STEARNS-BLOCK EQUIPMENT COMPANY, INC , A CORP OF DE | ASSIGNMENT OF ASSIGNORS INTEREST | 004669 | /0558 | |
| Feb 17 1987 | Lithibar Matik, Inc. | (assignment on the face of the patent) | / | |||
| Jul 11 1989 | STEARNS-BLOCK EQUIPMENT COMPANY, INC | LITHIBAR MATIK, INC | ASSIGNMENT OF ASSIGNORS INTEREST | 005136 | /0644 |
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