Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8813786 | Hydraulic valves with integral seals | Matthew H Tibbitts, David S Innes | 2014-08-26 |
| 8430125 | Combined control valve and coupler | Andrew E Massie | 2013-04-30 |
| 8210208 | Electrically operated hydraulic valve | Matthew H Tibbitts, David S Innes | 2012-07-03 |
| 7131504 | Pressure activated release member for an expandable drillbit | Albert C. Odell, II, Michael Smalley, Mark S. Fuller | 2006-11-07 |
| 6953096 | Expandable bit with secondary release device | Mark S. Fuller, Kenneth J. Dalrymple | 2005-10-11 |