Huffstutler; Alan D.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Huffstutler; Alan D..The latest application filed is for "method for manufacture and rebuild a rotary drill bit".
- Huffstutler; Alan D. - Cults GB6
- Huffstutler; Alan D. - Grand Prairie TX
| Patent | Date |
|---|---|
| Method for manufacture and rebuild a rotary drill bit Grant 5,606,895 - Huffstutler March 4, 1 | 1997-03-04 |
| Rotary cone drill bit with improved support arms Grant 5,595,255 - Huffstutler January 21, 1 | 1997-01-21 |
| Modular rotary drill bit Grant 5,439,068 - Huffstutler , et al. August 8, 1 | 1995-08-08 |
| Rock bit with enhanced fluid return area Grant 5,439,067 - Huffstutler August 8, 1 | 1995-08-08 |
| Rotary cone drill bit with improved cutter insert Grant 5,421,423 - Huffstutler June 6, 1 | 1995-06-06 |
| Patterned hardfacing shapes on insert cutter cones Grant 5,291,807 - Vanderford , et al. March 8, 1 | 1994-03-08 |
| Specially shaped cutting element for earth boring apparatus Grant 4,716,977 - Huffstutler January 5, 1 | 1988-01-05 |
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