Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845757 | Circuit for recognizing oscillations in a useful signal due to feedback between acoustic input and output transducers | — | 1989-07-04 |
| 4819768 | Actuating device for a disc brake for automotive vehicles | Erhard Czich, Wolfgang Endler | 1989-04-11 |
| 4815140 | Circuit arrangement for suppressing oscillations | — | 1989-03-21 |