Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6827189 | Electromagnetically actuated, single-surface friction coupling, without a rotor slip ring | Helmut Fronius | 2004-12-07 |
| 6680555 | Electromagnetic hysteresis unit | Stefan Unseld | 2004-01-20 |