Perfectionnements aux organes vibrants des microphones et des appareils dits <> électro-magnétiques et appareils analogues

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Bibliographic Details
Main Author GILLET ANDRE, AUGUSTE
Format Patent
LanguageFrench
Published 30.08.1938
Subjects
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
PUBLIC ADDRESS SYSTEMS
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Bibliography:Application Number: FRD831317