Issued Patents All Time
Showing 26–47 of 47 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4590965 | Pressure agent control arrangement for auxiliary power steering mechanisms | Helmut Knodler | 1986-05-27 |
| 4557344 | Servosteering, especially for motor vehicles | — | 1985-12-10 |
| 4555975 | Hydraulic steering | Helmut Knodler | 1985-12-03 |
| 4462478 | Servo steering | — | 1984-07-31 |
| 4456087 | Vehicle power steering apparatus | Walter Cerny | 1984-06-26 |
| 4438679 | Axial thrust compensating means for power steering control valve | Helmut Knodler | 1984-03-27 |
| 4438827 | Servo steering, especially for motor vehicles | — | 1984-03-27 |
| 4428449 | Comparator for the control circuit of an automatic steering installation | — | 1984-01-31 |
| 4413472 | High-pressure pump with pressure regulator | — | 1983-11-08 |
| 4390158 | Electro hydraulic servo valve | — | 1983-06-28 |
| 4385493 | Hydraulically assisted steering device | — | 1983-05-31 |
| 4383587 | Rack steering gear | — | 1983-05-17 |
| 4354555 | Hydraulic lifting arrangement for implements, especially on tractors | — | 1982-10-19 |
| 4344284 | Hydraulic auxiliary power steering | — | 1982-08-17 |
| 4331211 | Hydraulic steering system with reaction to the actuator | — | 1982-05-25 |
| 4325286 | Steering valve mechanism having closed neutral position | — | 1982-04-20 |
| 4313467 | Control valve | — | 1982-02-02 |
| 4304316 | Comparator for the automatic control system of an automatic steering installation | — | 1981-12-08 |
| 4219093 | Vehicle steering assist | — | 1980-08-26 |
| 4193471 | Power steering control with maintenance of hydraulic blocking of power cylinder | — | 1980-03-18 |
| 4189982 | Feed pressure bypass valving for servomotors | Rolf Fassbender | 1980-02-26 |
| 4189983 | Servomotor pressure control responsive to piston travel | Rolf Fassbender | 1980-02-26 |