Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4585213 | Well derrick | Raymond J. Swaim | 1986-04-29 |
| 4271903 | Retrievable annulus and tubing flow control valves | Donald O. Thomas, Jr. | 1981-06-09 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4585213 | Well derrick | Raymond J. Swaim | 1986-04-29 |
| 4271903 | Retrievable annulus and tubing flow control valves | Donald O. Thomas, Jr. | 1981-06-09 |