Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4524838 | Oil well jar | — | 1985-06-25 |
| 4273520 | Deep well pump | Jim L. Downen | 1981-06-16 |
| 4261427 | Long stroke jar bumper sub with safety sleeve | Jim L. Downen | 1981-04-14 |
| 4186807 | Optional up-blow, down-blow jar tool | Jim L. Downen | 1980-02-05 |