Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4613002 | Downhole drilling tool with improved swivel | Paul R. Pittman, William R. Hamilton | 1986-09-23 |
| 4351116 | Apparatus for making multiple orientation measurements in a drill string | — | 1982-09-28 |