Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4792000 | Method and apparatus for well drilling | Gregg S. Perkin | 1988-12-20 |
| 4776410 | Stabilizing tool for well drilling | Gregg S. Perkin | 1988-10-11 |
| 4765417 | Reaming apparatus for well drilling | Gregg S. Perkin | 1988-08-23 |
| 4709462 | Method for assembling a well drilling tool | Gregg S. Perkin | 1987-12-01 |