Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653577 | Turbine, in particular Francis turbine | — | 1997-08-05 |
| 5117923 | Hydraulic jackhammer | — | 1992-06-02 |
| 5107933 | Hydraulic drilling outfit | — | 1992-04-28 |
| 4563940 | Oil infeed device for an adjustable pitch propeller | — | 1986-01-14 |
| 4540341 | Adjustable propeller for marine vessel drive | — | 1985-09-10 |
| 4525916 | Method of coupling coaxial shafts | — | 1985-07-02 |
| 4509925 | Marine vessel propeller with nozzle | — | 1985-04-09 |
| 4406635 | Marine vessel with at least one propeller | — | 1983-09-27 |
| 4371350 | Marine vessel with propeller | Claus Kruppa | 1983-02-01 |