Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5293009 | Dust protection cap for conical loudspeaker | — | 1994-03-08 |
| 5287412 | Arrangement for reproducing bass tones in a vehicle | Hubert Etzel, Jorg Prokisch, Edgar Kirk | 1994-02-15 |