Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862974 | Downhole drilling assembly, apparatus and method utilizing drilling motor and stabilizer | Tommy M. Warren, Warren J. Winters | 1989-09-05 |
| 4815342 | Method for modeling and building drill bits | Lawrence Allen Sinor, Tommy M. Warren | 1989-03-28 |