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H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/57—Arrangements for indicating or recording the number of the calling subscriber at the called subscriber's set
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Signal Processing
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FR1134905D1954-07-311955-07-30Dispositif pour la signalisation automatique du numéro téléphonique appelant dansun appareil téléphonique d'abonné
ExpiredFR1134905A
(fr)