Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5823265 | Well completion system with well control valve | Robert W. Crow, John C. Gano, James R. Longbottom, Karluf Hagen | 1998-10-20 |
| 5022427 | Annular safety system for gas lift production | Ronald K. Churchman, Michael Wade Meaders | 1991-06-11 |