Issued Patents 1989
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861117 | Brake pressure regulator | Helmut Steffes | 1989-08-29 |
| 4848847 | Pressure supply system especially for brake systems of motor vehicles | Helmut Steffes, Franz Latka | 1989-07-18 |
| 4840436 | Anti-lock brake system with traction slip control | Jochen Burgdorf, Lutz Weise, Norbert Ocvirk, Horst Becker, Otto Determann | 1989-06-20 |
| 4838305 | Pressure differential valve | Helmut Steffes, Edwin Czarnetzki | 1989-06-13 |
| 4828333 | Slip-controlled brake system | Helmut Steffes | 1989-05-09 |
| 4819997 | Slip-controlled brake system | Helmut Steffes | 1989-04-11 |
| 4815793 | Hydraulic brake system for automotive vehicles | Helmut Steffes | 1989-03-28 |
| 4811809 | Traction slip control device | Helmut Steffes, Joachim Maas, Thomas Schwarz | 1989-03-14 |
| 4805966 | Slip-control hydraulic brake booster with braking-pressure responsive valve for fast-fill cylinder | Helmut Steffes | 1989-02-21 |
| 4804236 | Hydraulic brake system with anti-skid control and/or traction slip control | Jochen Burgdorf, Lutz Weise, Hans-Albert Beller | 1989-02-14 |