Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7591216 | Fluid powered dual-piston actuator with efficient fluid porting and method of implementation | Leonard T. Armstrong | 2009-09-22 |
| 7445662 | System and method for treating fluid using a multi-port valve assembly | — | 2008-11-04 |
| 7017915 | Stem or shaft seal arrangement | Philip J. Dorrian | 2006-03-28 |
| 6936091 | System and method for treating fluid using a multi-port valve assembly | — | 2005-08-30 |
| 6401754 | Four way valve | Melvin Winquist | 2002-06-11 |