Gearhart; Marvin
Patent Applications and Registrations
Patent applications and USPTO patent grants for Gearhart; Marvin.The latest application filed is for "direct drive mwd tool".
- Gearhart; Marvin - Fort Worth TX
- Gearhart; Marvin - Forth Worth TX
| Patent | Date |
|---|---|
| Compartmentalized MWD tool with isolated pressure compensator Grant 7,673,705 - Gearhart , et al. March 9, 2 | 2010-03-09 |
| Direct Drive MWD Tool App 20100025111 - GEARHART; Marvin ; et al. | 2010-02-04 |
| Compartmentalized Mwd Tool With Isolated Pressure Compensator App 20090301780 - GEARHART; Marvin ; et al. | 2009-12-10 |
| Modular kerfing drill bit App 20060196699 - Estes; Roy ; et al. | 2006-09-07 |
| Air and mud control system for underbalanced drilling Grant 5,873,420 - Gearhart February 23, 1 | 1999-02-23 |
| Telemetry system involving gigahertz transmission in a gas filled tubular waveguide Grant 5,831,549 - Gearhart November 3, 1 | 1998-11-03 |
| Roller cone core bit with spiral stabilizers Grant 5,289,889 - Gearhart , et al. March 1, 1 | 1994-03-01 |
| Downhole signaling system Grant 3,964,556 - Gearhart , et al. June 22, 1 | 1976-06-22 |
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