Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5046316 | Tandem master cylinder with filters arranged in central valves | Helmut Steffes | 1991-09-10 |
| 4951470 | Tandem master cylinder | Hans-Dieter Reinartz, Helmut Steffes | 1990-08-28 |