Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11795781 | Actuation valve system with pilot and main valves | Edward George Parkin, Julien Steimetz, Jonathan Marshall, D. Peter Johnson, Clint William Philbrick | 2023-10-24 |
| 11753907 | Pressure adjuster for a downhole tool | Edward George Parkin, Julien Steimetz, Cecily Millwater | 2023-09-12 |
| 10947814 | Pilot controlled actuation valve system | Edward George Parkin, Julien Steimetz, Jonathan Marshall, D. Peter Johnson, Clint William Philbrick | 2021-03-16 |
| 4316482 | Diaphragm valves | Glyn Cocking | 1982-02-23 |