Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5567130 | Reinforced cover configuration for a diaphragm pump | Harold D. Johnson | 1996-10-22 | $2,754,000 |
| 5368452 | Double diaphragm pump having two-stage air valve actuator | Harold D. Johnson, Steven Plager, Richard D. Zarneke | 1994-11-29 | $319,000 |
| 5337791 | Dynamic surge suppressor for fluid flow lines | Steven Plager | 1994-08-16 | $1,160,000 |
| 5280808 | Air valve actuator for reciprocable machine | Marlin R. Melquist, Steve Plager | 1994-01-25 | $1,208,000 |
| 5240390 | Air valve actuator for reciprocable machine | Marlin R. Melquist, Steve Plager | 1993-08-31 | $1,019,000 |
| 4921408 | Non-icing quiet air-operated pump | Frederick A. Powers, Kenneth E. Lehrke | 1990-05-01 | $1,184,000 |
| 4792291 | Viscous damped valve for hydraulic pump | Frederick A. Powers | 1988-12-20 | $793,000 |