Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800958 | Annulus pressure operated vent assembly | David M. Haugen, David S. Wesson, Kevin R. George | 1989-01-31 |
| 4762179 | Pressure assist detonating bar and method for a tubing conveyed perforator | David S. Wesson, Flint R. George, David M. Haugen, Kevin R. George | 1988-08-09 |
| 4732211 | Annulus pressure operated vent assembly | David M. Haugen, David S. Wesson, Kevin R. George | 1988-03-22 |
| 4693308 | Tubing conveyed perforating safety anchor | James M. Barker | 1987-09-15 |
| 4678044 | Tubing pressure operated initiator for perforating in a well borehole | James M. Barker, Michael Lee Smith, Larry Grigar, Carl B. Miller | 1987-07-07 |
| 4629001 | Tubing pressure operated initiator for perforating in a well borehole | Carl B. Miller, Michael Lee Smith, Larry Grigar | 1986-12-16 |