Patent
   D441380
Priority
Jun 16 2000
Filed
Jun 16 2000
Issued
May 01 2001
Expiry
May 01 2015
Assg.orig
Entity
unknown
8
1
n/a
The ornamental design for a rock drill bit, as shown and described.

FIG. 1 is a perspective view of a rock drill bit in accordance with my design;

FIG. 2 is side view thereof;

FIG. 3 is front view thereof;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

Hamilton, Charles, Hamilton, Gary Wayne

Patent Priority Assignee Title
6494276, Apr 24 1998 GATOR ROCK BITS, INC Rock auger with pilot drill
6619413, Apr 24 1998 GATOR ROCK BIT, INC Flightless rock auger for use with pressure drills with quick attachment and method of use
7131506, Apr 24 1998 GATOR ROCK BIT, INC Flightless rock auger for use with pressure drills with quick attachment and method of use
9249631, Sep 30 2011 Terex USA, LLC Extendable pilot bit for barrel cutter
9677360, Sep 30 2011 Terex USA, LLC Extendable pilot for barrel cutter
D457535, Jun 06 2000 GATOR ROCK BITS, INC Rock drill bit
D831714, May 29 2015 EPIROC DRILLING TOOLS AKTIEBOLAG Rock drill bit
D888778, Feb 06 2019 Lawn seed spike
Patent Priority Assignee Title
5197555, May 22 1991 BURINTEKH USA LLC Rock bit with vectored inserts
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Jun 16 2000Gator Rock Bits, Inc.(assignment on the face of the patent)
Feb 26 2001HAMILTON, GARY W GATOR ROCK BITS, INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0116850401 pdf
Feb 26 2001HAMILTON, CHARLESGATOR ROCK BITS, INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0116850401 pdf
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