Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4485272 | Acoustic feedback cancelling electro-acoustic transducer network | Tuan K. Duong, Maurice Bellanger | 1984-11-27 |
| 4484034 | Anti-larsen-effect arrangement in a telephone station equipped with a loudspeaker | Gilbert M. M. Ferrieu, Roger B. J. Hamel, Francoise Moliere | 1984-11-20 |
| 4386236 | Automatic sound level control of telephone station | Gilbert M. M. Ferrieu, Francoise Moliere | 1983-05-31 |
| 4296383 | Balancing amplifier | Jean-Louis Jeandot | 1981-10-20 |