Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4715485 | Clutch disc for a motor vehicle friction clutch | Gunther Rostin, Franz Hartig | 1987-12-29 |
| 4655336 | Clutch disc | Manfred Caspar, Franz Hartig | 1987-04-07 |
| 4643288 | Clutch disc | Franz Hartig | 1987-02-17 |
| 4640402 | Clutch disc | Franz Hartig, Matthias Fischer | 1987-02-03 |
| 4616744 | Friction clutch unit with a stop element for limiting presser plate travel | Dieter Kolb, Siegmund Gehrig, Alfred Meyer | 1986-10-14 |
| 4586595 | Clutch disc under-toad and idling damping means | Franz Hartig | 1986-05-06 |
| 4437555 | Multiple disk clutch with spring control lift | Erich Scheer | 1984-03-20 |