Patent
   D341532
Priority
Sep 26 1991
Filed
Mar 13 1992
Issued
Nov 23 1993
Expiry
Nov 23 2007
Assg.orig
Entity
unknown
13
6
n/a
The ornamental design for a concrete hammer, as shown.

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
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,
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Feb 28 1992WATANABE, SATORURyobi LTDASSIGNMENT OF ASSIGNORS INTEREST 0060530092 pdf
Feb 28 1992SAKAMOTO, MASAKAZURyobi LTDASSIGNMENT OF ASSIGNORS INTEREST 0060530092 pdf
Mar 13 1992Ryobi Ltd.(assignment on the face of the patent)
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