Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7300035 | Valve, actuator and control system therefor | Albert S. Davis, John M. Saldivar, David R. Mefford, Frank J. Arriens, Anthony Laitkep +3 more | 2007-11-27 |
| 7021602 | Valve, actuator and control system therefor | Albert S. Davis, John M. Saldivar, David R. Mefford, Frank J. Arriens | 2006-04-04 |
| 6986499 | Valve, actuator and control system therefor | Albert S. Davis, John M. Saldivar, David R. Mefford, Frank J. Arriens | 2006-01-17 |
| 6554024 | Stem seal pressure telltale | David R. Mefford, Paul M. Gutmann | 2003-04-29 |