Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4960370 | Internal axis rotary piston machine | Frank Obrist, by Gerhard Renz, executor, by Fried Meysen, executor, by Thomas Burkhardt, executor | 1990-10-02 |
| 4801255 | Internal axis single-rotation machine with intermeshing internal and external rotors | — | 1989-01-31 |
| 4793781 | External and internal rotor machine having internal axes and circumferential reinforcement web | — | 1988-12-27 |
| 4783083 | Fluid pressure operated sealing process and sealing means | — | 1988-11-08 |
| 4753584 | Single-rotation machine having internal and external rotors with axial cooling ducts for the external rotor | — | 1988-06-28 |
| 4735561 | Machine having plural fixed internal axes with reinforced rotor | — | 1988-04-05 |
| 4714417 | Internal axis single-rotation machine with intermeshing internal and external rotors | — | 1987-12-22 |
| 4626182 | External shaft rotary piston machine | — | 1986-12-02 |
| 4561836 | Rotary piston machine | — | 1985-12-31 |
| 4540356 | Internal axis crankless rotary piston engine | — | 1985-09-10 |
| 4490101 | Internally axed rotary piston engine | — | 1984-12-25 |
| 4305424 | Valve assembly | — | 1981-12-15 |
| 4296936 | Seal mechanism for the rotor periphery of a rotary piston engine | — | 1981-10-27 |
| 4207830 | Water foil | — | 1980-06-17 |
| 4203381 | Water foil | — | 1980-05-20 |