Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4333540 | Cutter element and cutter for rock drilling | John B. Cheatham, Jr. | 1982-06-08 |
| 4247305 | Abrasive structures and methods of their preparation | Mahlon D. Dennis, Earl Feingold | 1981-01-27 |