Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4420042 | Method for cutting and replacing tubing without killing well | — | 1983-12-13 |
| 4274432 | Valve | M. L. Warren | 1981-06-23 |
| 4199131 | Actuator module for wireline cutting safety valve | Israel Boski, M. L. Warren | 1980-04-22 |