Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4974495 | Electro-hydraulic valve actuator | — | 1990-12-04 |
| 4967702 | Fast acting valve | Frederick L. Erickson | 1990-11-06 |
| 4945870 | Vehicle management computer | — | 1990-08-07 |
| 4942852 | Electro-pneumatic actuator | Frederick L. Erickson | 1990-07-24 |
| 4915015 | Pneumatic actuator | Frederick L. Erickson | 1990-04-10 |
| 4883025 | Potential-magnetic energy driven valve mechanism | — | 1989-11-28 |
| 4878464 | Pneumatic bistable electronic valve actuator | Frederick L. Erickson | 1989-11-07 |
| 4875441 | Enhanced efficiency valve actuator | Frederick L. Erickson | 1989-10-24 |
| 4872425 | Air powered valve actuator | Frederick L. Erickson | 1989-10-10 |
| 4852528 | Pneumatic actuator with permanent magnet control valve latching | Frederick L. Erickson | 1989-08-01 |
| 4831973 | Repulsion actuated potential energy driven valve mechanism | — | 1989-05-23 |
| 4794890 | Electromagnetic valve actuator | — | 1989-01-03 |