Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5038640 | Titanium carbide modified hardfacing for use on bearing surfaces of earth boring bits | Eric C. Sullivan | 1991-08-13 |
| 4775016 | Downhole pressure fluctuating feedback system | — | 1988-10-04 |
| 4661932 | Dynamic downhole recorder | Mig A. Howard | 1987-04-28 |
| 4256187 | Impact tool with hydraulic cocking mechanism | — | 1981-03-17 |