Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4878470 | Device for actuating butterfly throttle valve of an internal combustion engine | Rainer Burkel, Kurt Engelsdorf, Rolf Gawlik | 1989-11-07 |
| 4816979 | Circuit for regulating the high-voltage supply of an electrostatic filter | Helmut Domann, Hartmann Rupp | 1989-03-28 |