Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5595253 | Hydraulic jar with improved detent ring | Glenn Martin | 1997-01-21 |
| 4715454 | Mechanical directional drilling jar with swivel means | Rene A. Chapelle, John E. Blacklaws, Lee E. McComsey | 1987-12-29 |
| 4630690 | Spiralling tapered slip-on drill string stabilizer | Thomas R. Beasley | 1986-12-23 |
| 4600062 | Shock absorbing drilling tool | — | 1986-07-15 |
| 4498548 | Well jar incorporating elongate resilient vibration snubbers and mounting apparatus therefor | — | 1985-02-12 |
| 4443206 | Well tool | — | 1984-04-17 |