Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5101942 | Hydraulic control systems for transmissions | Ludwig Pruss, Fritz Blumenstein | 1992-04-07 |
| 5019022 | Speed change arrangement | Fritz Blumenstein, Gerhard Witte | 1991-05-28 |