Issued Patents All Time
Showing 1–21 of 21 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7528736 | Loaded transducer for downhole drilling components | David R. Hall, Joe Fox | 2009-05-05 |
| 6416224 | Rolling cutter drill bits | Michael Scott Nixon, Ranjit Singh | 2002-07-09 |
| 6354740 | Rolling cutter drill bits | Ranjit Singh, Michael Scott Nixon | 2002-03-12 |
| 6338621 | Volume reduction mandrel for use in pneumatic isostatic forging | Adrian Vuyk, Jr. | 2002-01-15 |
| 6247545 | Single energizer face seal for rocks bits with floating journal bearings | Bruce H. Burr | 2001-06-19 |
| 6170611 | Method and apparatus for loading lubricant into earth boring bits | — | 2001-01-09 |
| 6060016 | Pneumatic isostatic forging of sintered compacts | Adrian Vuyk, Jr. | 2000-05-09 |
| 5931241 | Hydrostatic thrust face lubrication system | — | 1999-08-03 |
| 5875861 | Different stiffness energizers for MF seals | David E. Pearce, Thomas Wick | 1999-03-02 |
| 5725313 | Rolling cutter drill bits | Ranjit Singh, Michael Scott Nixon | 1998-03-10 |
| 5628375 | Thrust face lubrication system for a rolling cutter drill bit | — | 1997-05-13 |
| 5383525 | Threaded ring retention mechanism | Patsy N. Kepka | 1995-01-24 |
| 4830123 | Mounting means for cutting elements in drag type rotary drill bit | Percy W. Schumacher | 1989-05-16 |
| 4688647 | Drill bit having a failure indicator | Paul E. Pastusek | 1987-08-25 |
| 4682663 | Mounting means for cutting elements in drag type rotary drill bit | Percy W. Schumacher | 1987-07-28 |
| 4619534 | Roller cutter drill bit having a texturized seal member | Robert J. Kotch | 1986-10-28 |
| 4610313 | Drill bit having a failure indicator | Paul E. Pastusek | 1986-09-09 |
| 4548280 | Drill bit having a failure indicator | Paul E. Pastusek | 1985-10-22 |
| 4514097 | Friction bearing assembly having a series of rings constituting a bushing therefor | — | 1985-04-30 |
| 4452323 | Valve assembly for drill bit lubrication system | — | 1984-06-05 |
| 4412590 | Rock bit internal lubricant pump | — | 1983-11-01 |