Estes; Roy D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Estes; Roy D..The latest application filed is for "rock bit with channel structure for retaining cutter segments".
- Estes; Roy D. - Weatherford TX
- Estes; Roy D. - Ft. Worth TX
| Patent | Date |
|---|---|
| Rock bit with channel structure for retaining cutter segments Grant 7,025,155 - Estes April 11, 2 | 2006-04-11 |
| Stepped polycrystalline diamond compact insert Grant 6,904,984 - Estes , et al. June 14, 2 | 2005-06-14 |
| Roller cone bi-center bit Grant 6,902,014 - Estes June 7, 2 | 2005-06-07 |
| Adjustable earth boring device Grant 6,745,858 - Estes June 8, 2 | 2004-06-08 |
| Rock bit with vectored inserts Grant 5,197,555 - Estes March 30, 1 | 1993-03-30 |
| Rock bit with reaming rows Grant 5,145,016 - Estes September 8, 1 | 1992-09-08 |
| Kerf-cutting apparatus for increased drilling rates Grant 5,145,017 - Holster , et al. September 8, 1 | 1992-09-08 |
| Rock bit with improved shank protection Grant 5,074,367 - Estes December 24, 1 | 1991-12-24 |
| Rock bit loose cone indicator Grant 4,911,252 - Estes March 27, 1 | 1990-03-27 |
| Rock bit cone lock and method Grant 4,730,681 - Estes March 15, 1 | 1988-03-15 |
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