Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6176328 | Drill pipe protection rings and method of using the same | Douglas D. Hall | 2001-01-23 |
| 6109348 | Rotating blowout preventer | — | 2000-08-29 |
| 4697639 | Blow-out protector and fire control system for petroleum exploration | Bobby L. Caraway | 1987-10-06 |