Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11300229 | Packing module and stuffing box assembly | Jeffrey Leisy | 2022-04-12 |
| 5263847 | Subsurface tubing safety valve | Neil H. Akkerman | 1993-11-23 |
| 5137090 | Subsurface tubing safety valve | John P. Hare | 1992-08-11 |