Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697287 | Hydraulic power cylinder | — | 1997-12-16 |
| 5195556 | Pressure relief valve | — | 1993-03-23 |
| 5072585 | Hydrostatic auxiliary-power steering device | Bernd Ilg | 1991-12-17 |
| 5072586 | Hydrostatic servo-assisted steering system, particularly for motor vehicles | — | 1991-12-17 |
| 4798256 | Hydrostatic auxiliary steering device | — | 1989-01-17 |
| 4705129 | Hydrostatic steering arrangement, especially for motor vehicles | — | 1987-11-10 |
| 4558631 | Control system for two hydraulic power cylinders supplied by a pressure pump via one branch connection each | — | 1985-12-17 |
| 4553389 | Hydrostatic auxiliary steering apparatus | Werner Tischer, Karl-Heinz Liebert | 1985-11-19 |
| 4553390 | Hydrostatic steering arrangement | Karl-Heinz Liebert, Werner Tischer | 1985-11-19 |
| 4495769 | Booster power steering | Werner Tischer, Karl-Heinz Liebert | 1985-01-29 |
| 4466243 | Hydrostatic power steering system with curved valve return springs | Karl-Heinz Liebert, Werner Tischer | 1984-08-21 |
| 4306840 | Automatic connecting valve for hydraulic systems | — | 1981-12-22 |
| 4232584 | Control element for auxiliary power steerings | — | 1980-11-11 |
| 4189982 | Feed pressure bypass valving for servomotors | Armin Lang | 1980-02-26 |
| 4189983 | Servomotor pressure control responsive to piston travel | Armin Lang | 1980-02-26 |