Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10156912 | High speed, high precision six degree-of-freedom optical tracker system and method | Steven D. Martinez, Erik Erben | 2018-12-18 |
| D828580 | Chicken coop window | William D. Often, Mark Rawson | 2018-09-11 |
| D815510 | Glider swing arm | William D. Often, Mark Rawson | 2018-04-17 |
| 6328062 | Torsion spring connections for downhole flapper | Ronald D. Williams | 2001-12-11 |
| 6283477 | Annular chamber seal | Clifford H. Beall, Kurt A. Hickey | 2001-09-04 |
| 6269874 | Electro-hydraulic surface controlled subsurface safety valve actuator | Charles M. Tompkins, Doug Trott | 2001-08-07 |
| 6260850 | Annular chamber seal | Clifford H. Beall, Kurt A. Hickey | 2001-07-17 |
| 6253843 | Electric safety valve actuator | Doug Trott | 2001-07-03 |
| 5984260 | Electrically driven actuator with failsafe feature | Doug Trott, Charles M. Tompkins | 1999-11-16 |
| 5918858 | Undulating transverse interface for curved flapper seal | Doug Trott, Mark S. Megill, Clifford H. Beall | 1999-07-06 |
| 5799949 | Annular chamber seal | Clifford H. Beall, Kurt A. Hickey | 1998-09-01 |
| 5682921 | Undulating transverse interface for curved flapper seal | Doug Trott, Mark S. Megill, Clifford H. Beall | 1997-11-04 |
| 5496044 | Annular chamber seal | Clifford H. Beall, Kurt A. Hickey | 1996-03-05 |