Issued Patents 1982
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4349175 | Valve actuator having a continuously charged accumulator | Stephen R. Foster | 1982-09-14 |
| 4345651 | Apparatus and method for the mechanical sequential release of cementing plugs | Gonzalo Vazquez | 1982-08-24 |
| 4325402 | Bimodal, non-venting pneumatic relay | Bruce D. Christensen | 1982-04-20 |
| 4325431 | Flow controlling apparatus | — | 1982-04-20 |