Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8040603 | Transparency and backlight for cinema screen | Francois Giry, Gérard Debard | 2011-10-18 |
| 7024007 | Electric signal processing of electroacoustic transducer | Marc Charbonnaux, Patrice Morchain, Claude Annie Perrichon | 2006-04-04 |
| 6944306 | Harmonic amplifier and corresponding electro-acoustic transducer | Marc Charbonneaux, Patrice Morchain, Claude Annie Perrichon | 2005-09-13 |
| 6777603 | Perforated open volume acoustic resonator | Marc Charbonneaux, Patrice Morchain, Claude Annie Perrichon | 2004-08-17 |
| 6627805 | Audio device and method including a membrane having at least two tongues with different resonant frequencies | Marc Charbonneaux, Patrice Morchain, Claude Annie Perrichon | 2003-09-30 |
| 5446793 | Method of improving the quality of sound reproduction and apparatus for carrying at least one loudspeaker emitting in three directions | Claude Annie Perrichon | 1995-08-29 |