Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4914984 | Control valve for belt-drive continually variable transmission | Josef Fuss | 1990-04-10 |
| 4632230 | Valve system for a hydraulically controlled starting friction clutch | Manfred Bilharz, Fritz Henken, Hartmut Roper, Martin B. Taal, Peter Heider +1 more | 1986-12-30 |
| 4618123 | Valve system for a hydraulically controlled starting friction clutch | Manfred Bilharz, Peter Heider, Hartmut Roper, Martin B. Taal, Fritz Henken +1 more | 1986-10-21 |