Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809833 | Fluid friction clutch | Gerd Brunken, Peter Rossmanek | 1989-03-07 |
| 4801864 | Tester for terminal post resistance for an energy storage element connected in an electrical circuit | — | 1989-01-31 |