Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4696037 | Loudspeaker arrangement comprising one or more flat diaphragms | — | 1987-09-22 |
| 4567327 | Flat-diaphragm transducer and method of manufacturing such a transducer | Urbanus P. M. Goossens | 1986-01-28 |