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IPSOPHON PATENTGESELLSCHAFT A
Original Assignee
IPSOPHON PATENTGESELLSCHAFT A
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Filing date
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Application filed by IPSOPHON PATENTGESELLSCHAFT AfiledCriticalIPSOPHON PATENTGESELLSCHAFT A
Application grantedgrantedCritical
Publication of FR913402ApublicationCriticalpatent/FR913402A/en
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
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR913402D1945-08-161945-08-16
Telephonographer for recording and reproducing conversations
ExpiredFR913402A
(en)