Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812244 | Well drilling fluids and process for drilling wells | Arthur H. Hale | 1989-03-14 |
| 4740318 | Well drilling fluids and process for drilling wells | Arthur H. Hale | 1988-04-26 |