Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4464269 | Additive composition for release of stuck drill pipe | Thad O. Walker | 1984-08-07 |
| 4436638 | Additive composition for release of stuck drill pipe | Thad O. Walker | 1984-03-13 |
| 4427564 | Additive composition for release of stuck drill pipe | Darrell W. Brownawell, Antonio Gutierrez, Thad O. Walker | 1984-01-24 |