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The ornamental design for a concrete crusher, as shown and described. |
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FIG. 1 is a perspective view of a concrete crusher showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a is a rear view thereof;
FIG. 4 is right-side view thereof, the left-side view being a mirror image;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a sectional view thereof taken along line 7--7 in FIG. 2.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Sep 06 1990 | KANZAWA, MASAAKI | STONE IMPORT & DEVELOPMENT CO , LTD | ASSIGNMENT OF ASSIGNORS INTEREST | 005448 | /0725 | |
| Sep 06 1990 | KANZAWA, MASAAKI | Kabushiki Kaisha Sanki Seikosho | ASSIGNMENT OF ASSIGNORS INTEREST | 005448 | /0725 | |
| Sep 10 1990 | Stone Import & Development Co., Ltd. | (assignment on the face of the patent) | / | |||
| Sep 10 1990 | Kabushiki Kaisha Sanki Seikosho | (assignment on the face of the patent) | / |
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