Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4717996 | Gated parallel power switching devices protection circuit | David L. Layden, Richard I. Cook | 1988-01-05 |
| 4692854 | Method and apparatus for modulating inverter pulse width | Richard V. Baxter, Jr., David R. Ellingson, Terrance D. Paul, David L. Layden | 1987-09-08 |
| 4301396 | Thermal current limiting controller | — | 1981-11-17 |
| 4267500 | Control cooling means | David K. Johansen | 1981-05-12 |
| 4262769 | Universal command signal producing means | Kenneth G. Bernoteit | 1981-04-21 |
| 4258306 | State of battery charge indicator circuit | David K. Johansen | 1981-03-24 |
| 4258304 | Battery charger for electrical vehicle | — | 1981-03-24 |
| 4246522 | Power converter with programmable commutation | David Thimmesch | 1981-01-20 |
| 4218644 | Time controlled battery charger | David K. Johansen | 1980-08-19 |
| 4217527 | Electrical vehicle controller with programmed motor current | David Thimmesch | 1980-08-12 |
| 4217529 | Propulsion system for electrical vehicle | David Thimmesch | 1980-08-12 |