Issued Patents All Time
Showing 51–53 of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4714120 | Diamond drill bit with co-joined cutters | — | 1987-12-22 |
| 4696354 | Drilling bit with full release void areas | Edmund C. Houle, Jr. | 1987-09-29 |
| 4667756 | Matrix bit with extended blades | Arthur M. Handsel, David Nguyen | 1987-05-26 |