Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4922423 | Position and seal wear indicator for valves and blowout preventers | George Savage, James T. Stewart | 1990-05-01 |
| 4278105 | Spherical accumulator with buoyant float | — | 1981-07-14 |