Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5129458 | Treating an underground formation | Andreas S. W. van Paassen | 1992-07-14 |
| 5127457 | Method and well system for producing hydrocarbons | Robert B. Stewart | 1992-07-07 |
| 4247156 | Shaft bearing | — | 1981-01-27 |