Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4454384 | Hands free telephone with switchable gain in the two speech signal paths | Gilbert M. M. Ferrieu, Jacques Y. Balch | 1984-06-12 |
| 4414434 | Electronic subscriber line interface circuit having means to equalize current through the output differential amplifier | Gilbert M. M. Ferrieu, Etienne J. R. Osmond | 1983-11-08 |
| 4356355 | Apparatus for detecting the closure of a subscriber's line during ringing | Gilbert M. M. Ferrieu, Etienne J. R. Osmond | 1982-10-26 |