Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4965826 | Method of and system for scrambling/descrambling sound | Didier Goguillon | 1990-10-23 |
| 4908860 | System for the secret transmission of audio signals and television receiver for receiving such signals | Thierry Chretien, Richard Dauvillier | 1990-03-13 |