Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9376882 | Self-energizing annular seal | David H. Theiss, Christopher George Kocurek, James A. Burton, Terry L. Shinn | 2016-06-28 |
| 8613323 | Wellhead assembly | Andrew Bean, Hans Paul Hopper | 2013-12-24 |
| 4995458 | Wear bushing retrieval tool | — | 1991-02-26 |
| 4862960 | Blowout preventer testing apparatus | — | 1989-09-05 |