Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6710574 | Reversible DC motor drive including a DC/DC converter and four quadrant DC/DC controller | Anthony J. Davis, Michael A. Urbassik | 2004-03-23 |
| 6157148 | Contactorless multi-motor controller for battery-powered vehicles | — | 2000-12-05 |
| 4639647 | Four quadrant control of series motors | — | 1987-01-27 |
| 4633147 | Electric powered vehicle and method of propelling the same | Rowland Hill | 1986-12-30 |