Issued Patents All Time
Showing 51–55 of 55 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4292578 | Combination field chopper and battery charger | Robert Louis Steigerwald, Keith E. Crouch | 1981-09-29 |
| 4288732 | Forced commutated starting circuit for load commutated inverter drive system | Robert Louis Steigerwald | 1981-09-08 |
| 4254192 | Primary galvanic cell | Philip A. Bernstein, James P. Coffey | 1981-03-03 |
| 4247807 | Method and apparatus for operating DC motors at high efficiency | — | 1981-01-27 |
| 4224535 | Efficient base drive circuit for high current transistors | Robert Louis Steigerwald | 1980-09-23 |