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The ornamental design for a power concrete hammer, as shown. |
FIG. 1 is a front, top, and right side perspective view of a power concrete hammer showing our new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a front elevational view thereof; and
FIG. 7 is a rear elevational view thereof.
Saito, Toshiaki, Sakamoto, Masakazu
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Jul 15 1986 | SAKAMOTO, MASAKAZU | Ryobi LTD | ASSIGNMENT OF ASSIGNORS INTEREST | 005044 | /0040 | |
Jul 15 1986 | SAITO, TOSHIAKI | Ryobi LTD | ASSIGNMENT OF ASSIGNORS INTEREST | 005044 | /0040 | |
Jul 22 1986 | Ryobi Ltd. | (assignment on the face of the patent) | / |
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