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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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FR1059071D1951-04-211952-04-21Dispositif pour l'enregistrement objectif de conversations ou de communications téléphoniques
ExpiredFR1059071A
(fr)