Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8474537 | High capacity wellhead connector having a single annular piston | Robert K. Voss, Perry J. Stokes, David W. Hughes, Joseph W. Pallini, William T. Higgins | 2013-07-02 |
| 8087181 | Valve body seat pocket inspection tool | Rick C. Hunter | 2012-01-03 |
| 7219741 | Tubing annulus valve | Stephen P. Fenton, Jon E. Hed | 2007-05-22 |
| 7063160 | Non-orienting tubing hanger system with a flow cage | Stephen P. Fenton, Jon E. Hed | 2006-06-20 |
| 6840323 | Tubing annulus valve | Stephen P. Fenton, Jon E. Hed | 2005-01-11 |