Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7077256 | Speed differential-dependent hydraulic clutch with a control valve | Franz Gratzer | 2006-07-18 |
| 5323870 | Adjustable viscous shear coupling for an all-wheel drive vehicle and a process for its control | Martin Parigger, Gerhard Mullner, Johann Rieger, Hermann Pecnik | 1994-06-28 |