Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454205 | Method of drill bit manufacture and product | Ronald R. Miller, William R. Barber, Jr., James Ault | 1984-06-12 |
| 4404760 | Excavating tooth | Frecerick C. Hahn, William R. Barber, Jr. | 1983-09-20 |
| 4335532 | Excavating tooth | Frederick C. Hahn, William R. Barber, Jr. | 1982-06-22 |