Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6536388 | Variable engine valve control system | — | 2003-03-25 |
| 6505584 | Variable engine valve control system | — | 2003-01-14 |
| 6435213 | Solenoid operated hydraulic control valve | — | 2002-08-20 |
| 5992582 | Electrorheological rotary pure-shear damping devices | Robert D. Ervin, Frank E. Filisko, Christopher B. Winkler | 1999-11-30 |