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CHR GFELLER AG
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CHR GFELLER AG
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Application filed by CHR GFELLER AGfiledCriticalCHR GFELLER AG
Application grantedgrantedCritical
Publication of FR836518ApublicationCriticalpatent/FR836518A/fr
H04M11/00—Telephonic communication systems specially adapted for combination with other electrical systems
H04M11/04—Telephonic communication systems specially adapted for combination with other electrical systems with alarm systems, e.g. fire, police or burglar alarm systems
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Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR836518D1937-04-191938-04-12Dispositif pour la commande à distance de relais par les conducteurs téléphoniques
ExpiredFR836518A
(fr)