Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9133688 | Integral multiple stage safety valves | Thomas G. Hill, Jr. | 2015-09-15 |
| 8701781 | Subsurface safety valve flapper | Robert C. Henschel | 2014-04-22 |
| 7798235 | Safety valve torsional spring assembly and method | Maximiliano Mondelli, Robert C. Henschel | 2010-09-21 |
| 6854519 | Subsurface valve with system and method for sealing | Thomas M. Deaton, Winfield M. Sides, III, Roddie R. Smith | 2005-02-15 |
| 6851477 | Curved flapper with angle variant seat for a subsurface safety valve | Thomas G. Hill, Jr., Robert C. Henschel | 2005-02-08 |
| 6666271 | Curved flapper and seat for a subsurface saftey valve | Thomas M. Deaton | 2003-12-23 |