Issued Patents All Time
Showing 26–36 of 36 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5082062 | Horizontal inflatable tool | Edward T. Wood, David H. Surgnier | 1992-01-21 |
| 5050843 | Plug valve with metal-to-metal sealing | — | 1991-09-24 |
| 4967844 | Selectively operable ball valve and production packer system | William T. Tapp | 1990-11-06 |
| 4476933 | Lubricator valve apparatus | — | 1984-10-16 |
| 4452583 | Liquid hydrocarbon burning method and apparatus | — | 1984-06-05 |
| 4436157 | Latch mechanism for subsea test tree | — | 1984-03-13 |
| 4420043 | Valving apparatus for selectively sealing an annulus defined between a work string and the bore of an element of a production string of a subterranean well | — | 1983-12-13 |
| 4415037 | Ball valve loading apparatus | — | 1983-11-15 |
| 4406328 | Apparatus for locking a ball valve element in one position | — | 1983-09-27 |
| 4320804 | Subsea test tree | — | 1982-03-23 |
| 4306623 | Valve assembly for a subterranean well conduit | — | 1981-12-22 |