Issued Patents 1982
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4363465 | Extreme temperature, high pressure balanced, rising stem gate valve with super preloaded, stacked, solid lubricated, metal-to-metal seal | — | 1982-12-14 |
| 4346919 | Remote automatic make-up stab-in sealing system | — | 1982-08-31 |
| 4329085 | Connection of underwater lines | John M. Des Lierres, Louis E. Copeland | 1982-05-11 |