Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4745983 | Bit seat protector device for drilling systems or the like | John Moorehead | 1988-05-24 |
| 4712626 | Retainer device for drill bit | — | 1987-12-15 |
| 4480874 | Retainer device for auger, roof and the like type bits | — | 1984-11-06 |