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The ornamental design for a concrete hammer, as shown. |
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FIG. 1 is a front, top and right side perspective view of a concrete hammer showing our new design;
FIG. 2 is a right side elevational view thereof;
FIG. 3 is a left 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.
Watanabe, Satoru, Sakamoto, Masakazu
| Patent | Priority | Assignee | Title |
| D378341, | Feb 28 1995 | LG INDUSTRIAL SYSTEMS CO , LTD | Hammer drill |
| D447032, | Apr 19 2000 | Robert Bosch GmbH | Hammer drill |
| D447677, | Nov 18 1999 | Black & Decker Inc | Demolition hammer |
| D466780, | Mar 16 2000 | Black & Decker Inc | Hammer drill |
| D503327, | Mar 27 2003 | Newfrey LLC | Blind rivet setting tool |
| D524626, | Feb 10 2005 | Black & Decker Inc | Hammer |
| D527601, | Feb 10 2005 | Black & Decker Inc | Hammer |
| D540642, | Feb 10 2005 | Black & Decker Inc | Hammer |
| D570174, | Nov 09 2006 | Black & Decker Inc | Pavement breaker |
| D580250, | Nov 09 2006 | Black & Decker Inc. | Pavement breaker |
| D687280, | May 25 2011 | Robert Bosch GmbH | Hammer drill |
| D842062, | Aug 24 2017 | Scheppach Fabrikation von Holzbearbeitungsmaschinen GmbH | Electric hammer |
| D853815, | Nov 06 2017 | INGERSOLL-RAND INDUSTRIAL U S , INC | D-handle impact tool |
| ER1385, | |||
| ER620, |
| Patent | Priority | Assignee | Title |
| D301967, | Feb 11 1986 | Ryobi Ltd. | Power concrete hammer |
| D310936, | Sep 09 1987 | Ryobi Ltd. | Power hammer drill |
| D316020, | Dec 22 1987 | Makita Electric Works, Ltd. | Portable electric hammer drill |
| D333767, | Feb 23 1990 | Hitachi Koki Company, Limited | Portable cordless hammer |
| JP420927, | |||
| JP562326, |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Feb 28 1992 | WATANABE, SATORU | Ryobi LTD | ASSIGNMENT OF ASSIGNORS INTEREST | 006053 | /0092 | |
| Feb 28 1992 | SAKAMOTO, MASAKAZU | Ryobi LTD | ASSIGNMENT OF ASSIGNORS INTEREST | 006053 | /0092 | |
| Mar 13 1992 | Ryobi Ltd. | (assignment on the face of the patent) | / |
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