Patents per Year
Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5546980 | Floating cage cartridge valve and knob | — | 1996-08-20 | |
| 5158150 | Hydraulic wheelchair | Stanley C. Askeland | 1992-10-27 | |
| 4921547 | Proportional priority flow regulator | — | 1990-05-01 | $4,667,000 |
| 4653527 | Pressure relief valve | — | 1987-03-31 | |
| 4531536 | Flow divider-combiner valve | — | 1985-07-30 | |
| 4341148 | Hydraulic sequencing valve | — | 1982-07-27 | |
| 4300584 | Hydraulic sequence valve | — | 1981-11-17 | |
| 4223693 | Counterbalance valve | — | 1980-09-23 |