Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4724913 | Drill bit and improved cutting element | — | 1988-02-16 |
| 4533005 | Adjustable nozzle | — | 1985-08-06 |
| 4499958 | Drag blade bit with diamond cutting elements | Robert P. Radtke | 1985-02-19 |
| 4359113 | Earth boring bit with extended gage | — | 1982-11-16 |