Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6463156 | Active device for attenuating the intensity of sound | Lionel Gaudriot | 2002-10-08 |
| 5834647 | Active device for attenuating the sound intensity | Lionel Gaudriot | 1998-11-10 |