Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9903482 | Ball valve stem retaining system | Paul M. Gutmann | 2018-02-27 |
| 9103449 | Ball valve stem retaining system | Paul M. Gutmann | 2015-08-11 |
| 8308131 | Ball valve stem retaining system | Paul M. Gutmann | 2012-11-13 |
| 7300035 | Valve, actuator and control system therefor | Albert S. Davis, David R. Mefford, Frank J. Arriens, Daryl Ard, Anthony Laitkep +3 more | 2007-11-27 |
| 7021602 | Valve, actuator and control system therefor | Albert S. Davis, David R. Mefford, Frank J. Arriens, Daryl Ard | 2006-04-04 |
| 6986499 | Valve, actuator and control system therefor | Albert S. Davis, David R. Mefford, Frank J. Arriens, Daryl Ard | 2006-01-17 |