Pearce; David E.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Pearce; David E..The latest application filed is for "face seal having strain induced face geometry".
- Pearce; David E. - Houston TX
- Pearce; David E. - Spring TX
| Patent | Date |
|---|---|
| Face seal having strain induced face geometry Grant 6,109,376 - Pearce August 29, 2 | 2000-08-29 |
| Different stiffness energizers for MF seals Grant 5,875,861 - Daly , et al. March 2, 1 | 1999-03-02 |
| Rolling cutter drill bits Grant 5,465,800 - Pearce , et al. November 14, 1 | 1995-11-14 |
| Hydraulic action for rotary drill bits Grant 5,096,005 - Ivie , et al. * March 17, 1 | 1992-03-17 |
| Nozzle means for rotary drill bits Grant 5,029,656 - Ivie , et al. July 9, 1 | 1991-07-09 |
| Means for mounting a roller cutter on a drill bit Grant 4,991,671 - Pearce , et al. February 12, 1 | 1991-02-12 |
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