Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6688324 | Valve for hydrate forming environments | David R. Mefford | 2004-02-10 |
| 5803431 | Shearing gate valve | Brian Haynes | 1998-09-08 |
| 4997162 | Shearing gate valve | Gerald S. Baker | 1991-03-05 |