Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6250408 | Earth-boring drill bits with enhanced formation cuttings removal features | Craig H. Cooley | 2001-06-26 |
| 6230827 | Earth-boring drill bits with enhanced formation cuttings removal features and methods of drilling | Craig H. Cooley | 2001-05-15 |
| 6125947 | Earth-boring drill bits with enhanced formation cuttings removal features and methods of drilling | Craig H. Cooley | 2000-10-03 |
| 6079507 | Drill bits with enhanced hydraulic flow characteristics | Sean K. Berzas, Craig H. Cooley, Wayne R. Hansen | 2000-06-27 |
| 5836404 | Drill bits with enhanced hydraulic flow characteristics | Sean K. Berzas, Craig H. Cooley, Wayne R. Hansen | 1998-11-17 |
| 5794725 | Drill bits with enhanced hydraulic flow characteristics | Sean K. Berzas, Craig H. Cooley, Wayne R. Hansen | 1998-08-18 |
| 5279375 | Multidirectional drill bit cutter | Gordon A. Tibbitts | 1994-01-18 |
| 4913244 | Large compact cutter rotary drill bit utilizing directed hydraulics for each cutter | — | 1990-04-03 |
| 4883136 | Large compact cutter rotary drill bit utilizing directed hydraulics for each cutter | — | 1989-11-28 |