Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5873414 | Bypass valve for downhole motor | — | 1999-02-23 |
| 5833018 | Drill pipe/casing protector | — | 1998-11-10 |
| 5829964 | Flare line gas purge system | Buddy L. Derrick | 1998-11-03 |