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Frederic Zurcher
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Lannion, FR
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last 30 patents
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Patent Grant
Loudspeaker gain correction for a hands-free telephone terminal
Patent number
5,970,137
Issue date
Oct 19, 1999
Prescom
Yves Le Damany
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Sound acquisition method and system, and sound acquisition and repr...
Patent number
5,524,059
Issue date
Jun 4, 1996
Prescom
Frederic Zurcher
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Differential encoder with self-adaptive predictive filter and a dec...
Patent number
4,939,749
Issue date
Jul 3, 1990
Etat Francais represente par le Ministre des Postes Telecommunications et de...
Frederic Zurcher
H03 - BASIC ELECTRONIC CIRCUITRY