Issued Patents All Time
Showing 1–20 of 20 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834347 | Positioner with large diameter piston rod and fluted volume-compensating piston | — | 1989-05-30 |
| 4824081 | Pistonless-plunger positioner with internal cylinder and annular fluid space | — | 1989-04-25 |
| 4667780 | Re-chargeable servo cylinder | — | 1987-05-26 |
| 4570669 | Simplified springless check valve | — | 1986-02-18 |
| 4543983 | O-ring solenoid water valves | — | 1985-10-01 |
| 4501289 | Fluid proportioning diverter valve | — | 1985-02-26 |
| 4494912 | Energy conserving air pump | — | 1985-01-22 |
| 4457210 | Rotary actuator with energy conservation | — | 1984-07-03 |
| 4457498 | Force balanced die cylinders | — | 1984-07-03 |
| 4441687 | O-ring solenoid valve | — | 1984-04-10 |
| 4418717 | Modular pressure letdown valve | — | 1983-12-06 |
| 4320782 | Universal momentary contact diverter | — | 1982-03-23 |
| 4321021 | Metering pump | — | 1982-03-23 |
| 4317469 | Momentary contact diverter valve | — | 1982-03-02 |
| 4290579 | O-ring solenoid valves | — | 1981-09-22 |
| 4270571 | High pressure letdown valve | — | 1981-06-02 |
| 4242571 | Electro-thermal linear pull actuator | — | 1980-12-30 |
| 4231399 | Momentary contact reversing diverter | — | 1980-11-04 |
| 4220312 | Cryosolenoid valve | — | 1980-09-02 |
| 4189285 | Metering pump | — | 1980-02-19 |