Patent
   D568132
Priority
Sep 13 2006
Filed
Mar 07 2007
Issued
May 06 2008
Expiry
May 06 2022
Assg.orig
Entity
unknown
7
13
n/a
The ornamental design for a sharpener for drill bits, as shown and described.

FIG. 1 is a front, right side and top perspective view of a sharpener for drill bits showing my new design;

FIG. 2 is a front, left side and top perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

Heun, Ping Hay

Patent Priority Assignee Title
10702965, Mar 19 2018 Cross-recess screwdriver grinding assembly
11117205, Mar 28 2018 TECOMEC S.R.L. Portable sharpener
D756737, Oct 21 2014 TECOMEC S.R.L. Chainsaw sharpener
D757514, Oct 21 2014 TECOMEC S.R.L. Chainsaw sharpener
D758156, Jun 20 2014 AMA S P A Sharpener
D838158, Jul 18 2016 Jiin Haur Industrial Co. Ltd. Knife sharpener
D969889, Dec 13 2019 TECOMEC S.R.L. Sharpening machine
Patent Priority Assignee Title
3769757,
4016680, Apr 01 1974 The Black and Decker Manufacturing Company Sharpener for twist drills including grinding wheel dressing means
4031672, Apr 01 1974 The Black and Decker Manufacturing Company Sharpen twist drills or the like
4742648, Nov 21 1984 Drill sharpening tool
4974372, Apr 12 1989 Universal device for sharpening drill bits
5311703, Aug 11 1990 Martek Limited Multiple purpose tool grinding device
5400546, Mar 19 1993 Darex Corporation Precision twist drill sharpener/point splitting machine
5735732, Jul 05 1996 BERNARD, DAVID A Precision drill sharpener and grinding wheel assembly therefor
6626745, Jul 05 1996 BERNARD, DAVID A Precision drill sharpener and grinding wheel assembly therefor
7121932, Jul 06 2004 Portable drill sharpener
7172498, Sep 27 2002 AstraZeneca UK Limited Drill sharpener
D324224, Aug 17 1989 Drill sharpener
D356483, Nov 23 1993 Drill bit sharpening attachment
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Mar 06 2007HEUN, PING HAYCHOON NANG ELECTRICAL APPLIANCE MFY , LTD ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0190160861 pdf
Mar 07 2007Choon Nang Electrical Appliance Mfy., Ltd(assignment on the face of the patent)
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