Marc Charbonneaux

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Lyon, FR

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Patents Grantslast 30 patents

Information Patent Grant
Harmonic amplifier and corresponding electro-acoustic transducer
- Patent number 6,944,306
- Issue date Sep 13, 2005
- Pica-Sound International
- Marc Charbonneaux
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Perforated open volume acoustic resonator
- Patent number 6,777,603
- Issue date Aug 17, 2004
- Pica-Sound International
- Marc Charbonneaux
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Audio device and method including a membrane having at least two to...
- Patent number 6,627,805
- Issue date Sep 30, 2003
- Pica-Sound International
- Marc Charbonneaux
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Perforated open volume acoustic resonator
- Publication number 20030029669
- Publication date Feb 13, 2003
- Pica-Sound International
- Marc Charbonneaux
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Application
High definition transducer
- Publication number 20020048386
- Publication date Apr 25, 2002
- Claude Annie Perrichon
- H04 - ELECTRIC COMMUNICATION TECHNIQUE