Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11105706 | Hydrostatic and vibration test method for a blowout preventer | Clifford Lee Hilpert | 2021-08-31 |
| 10996132 | Method for testing for fluid leaks | Clifford Lee Hilpert | 2021-05-04 |
| 10739223 | Hydrostatic pressure test method and apparatus | Clifford Lee Hilpert, Lewis J. Dutel, Laura Tufts Meyer | 2020-08-11 |
| 10655737 | Dual seat valve | Clifford Lee Hilpert | 2020-05-19 |
| 10605692 | Automated bop control and test system | Clifford Lee Hilpert | 2020-03-31 |
| 10393616 | Hydrostatic and vibration test method for a blowout preventer | Clifford Lee Hilpert | 2019-08-27 |
| 10330561 | Method for testing for fluid leaks | Clifford Lee Hilpert | 2019-06-25 |
| 10267705 | Hydrostatic and vibration test system for a blowout preventative | Clifford Lee Hilpert | 2019-04-23 |
| 10190381 | Variable ratio rotary energy control device for a blowout preventer safety device | Clifford Lee Hilpert | 2019-01-29 |
| 10161824 | Hydrostatic pressure test method and apparatus | Clifford Lee Hilpert, Lewis J. Dutel, Laura Tufts Meyer | 2018-12-25 |
| 10113650 | Dual seat valve | Clifford Lee Hilpert | 2018-10-30 |
| 10107712 | Automated blowout preventer control and testing system | Clifford Lee Hilpert | 2018-10-23 |
| 9861991 | Control system for a decanter centrifuge | — | 2018-01-09 |