Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4543537 | Method of and arrangement for controlling the gain of an amplifier | Michael Harald Kuhn, Rudolf Geppert | 1985-09-24 | $953,000 |
| 4445229 | Device for adjusting a movable electro-acoustic sound transducer | Manfred Tasto, Michael Harald Kuhn, Horst Tomaschewski, Rudolf Geppert, Hermann Ney | 1984-04-24 | $834,000 |