Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7954555 | Full function downhole valve and method of operating the valve | Jace E. Melder, Paul L. Connell | 2011-06-07 |
| 7703533 | Shear type circulation valve and swivel with open port reciprocating feature | Gregory L. Hern | 2010-04-27 |