Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4632230 | Valve system for a hydraulically controlled starting friction clutch | Fritz Henken, Hartmut Roper, Martin B. Taal, Peter Heider, Ernst Kohl +1 more | 1986-12-30 |
| 4618123 | Valve system for a hydraulically controlled starting friction clutch | Peter Heider, Hartmut Roper, Martin B. Taal, Fritz Henken, Ernst Kohl +1 more | 1986-10-21 |