Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8179063 | Traction drive of a rail vehicle for driving and generative braking | Ulf Friesen | 2012-05-15 |
| 8076878 | Traction drive of a rail vehicle for driving and generative braking with load correction | Ulf Friesen, Josef Schmucker | 2011-12-13 |