Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5331261 | Regenerative braking protection for an electrically-propelled traction vehicle | Herbert J. Brown, Ronald F. Griebel, Ajith Kuttannair Kumar, Dean S. Grinch | 1994-07-19 |
| 4568996 | Protective circuit for a separately excited d-c motor | — | 1986-02-04 |
| 4495449 | Electric propulsion system for traction vehicles with automatic retard speed regulation | Kenneth G. Black | 1985-01-22 |
| 4302811 | Automatic train operation with position stop and velocity control | — | 1981-11-24 |