PIEZOELECTRIC TRANSDUCER UNIT FOR TELEPHONE SETS

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Bibliographic Details
Main Author ANDERT, TOMAS JAN
Format Patent
LanguageEnglish
German
Published 04.03.1992
Edition5
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: EP19900122558