Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6557332 | Control valve for switching a hydraulic piston-cylinder unit for purposes of driving an oscillatory machine part | — | 2003-05-06 |
| 6516595 | Harvesting machine having an obstacle sensing device | Helmut Franke | 2003-02-11 |
| 6026840 | Hydraulic control system | Helmut Franke | 2000-02-22 |
| 5503534 | Automotive drive control for hydrostatic transmission | — | 1996-04-02 |