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