Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5137090 | Subsurface tubing safety valve | Thomas Buckner | 1992-08-11 |
| 4726421 | Latching devices | Neil H. Akkerman | 1988-02-23 |
| 4640350 | Kickover tool | Neil H. Akkerman | 1987-02-03 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5137090 | Subsurface tubing safety valve | Thomas Buckner | 1992-08-11 |
| 4726421 | Latching devices | Neil H. Akkerman | 1988-02-23 |
| 4640350 | Kickover tool | Neil H. Akkerman | 1987-02-03 |