Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4794822 | Rock bit manufacturing method | Rodney A. Bellamy | 1989-01-03 |
| 4369849 | Large diameter oil well drilling bit | — | 1983-01-25 |
| 4293167 | Rolling cutter drill bit with improved journal configuration | Terry H. Mayo | 1981-10-06 |