Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5584353 | Well jar accelerator with expansion chamber | Roger Chancey, Archie W. Peil | 1996-12-17 |
| 4706745 | Lock-down releasing spear assembly | Thomas R. Bishop, Clyde D. Roque | 1987-11-17 |
| 4439167 | Shock absorber assembly | Thomas R. Bishop, Archie W. Peil, Roger Chancey | 1984-03-27 |
| 4387885 | Shock absorber assembly for absorbing shocks encountered by a drill string | Thomas R. Bishop, Roger Chancey | 1983-06-14 |