Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5021170 | Oil-based well bore fluids and gellants therefor | Thomas G. Shumate | 1991-06-04 |
| 4321660 | Universal trouble light | — | 1982-03-23 |
| 4258414 | Universal trouble light | — | 1981-03-24 |