Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4942951 | Liquid friction coupling and motor vehicle comprising the same | August Kriebernegg, Peier Othmar | 1990-07-24 |
| 4923029 | Drive means for all-wheel-driven motor vehicles | — | 1990-05-08 |
| 4850246 | Interaxle differential for motor vehicles | Eberhard Wilks | 1989-07-25 |
| 4842111 | Drive system for motor vehicles having driven front and rear axles | Peter Resele | 1989-06-27 |
| 4747464 | Drive system for motor vehicles having two driven axles | — | 1988-05-31 |
| 4747643 | Motor vehicle having two driven axles and brake system | — | 1988-05-31 |
| 4729259 | Interaxle differential system for connecting two driven axles of a motor vehicle | — | 1988-03-08 |
| 4729262 | Transmission unit | — | 1988-03-08 |
| 4712448 | Drive mechanism for motor vehicles having two drive axles | — | 1987-12-15 |
| 4700800 | Drive system for motor vehicles | Karl Friedrich | 1987-10-20 |
| 4672861 | Drive system for automobiles having two driven axles | — | 1987-06-16 |
| 4589304 | Driving gear interaxle differential assembly for all-wheel-drive vehicles | Noboru Ashikawa, Karl Friedrich | 1986-05-20 |