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H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/64—Automatic arrangements for answering calls; Automatic arrangements for recording messages for absent subscribers; Arrangements for recording conversations
H04M1/65—Recording arrangements for recording a message from the calling party
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Engineering & Computer Science
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Signal Processing
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Interconnected Communication Systems, Intercoms, And Interphones
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FR420655A1910-10-201910-09-22Procédé et dispositif pour transmettre et enregistrer des communications verbales, par l'intermédiaire du téléphone
ExpiredFR420655A
(fr)