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The ornamental design for a rock drill bit, as shown and described. |
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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 |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jun 16 2000 | Gator Rock Bits, Inc. | (assignment on the face of the patent) | / | |||
| Feb 26 2001 | HAMILTON, GARY W | GATOR ROCK BITS, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 011685 | /0401 | |
| Feb 26 2001 | HAMILTON, CHARLES | GATOR ROCK BITS, INC | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 011685 | /0401 |
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