Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCHOUBRITCH SOC
Original Assignee
TCHOUBRITCH SOC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TCHOUBRITCH SOCfiledCriticalTCHOUBRITCH SOC
Application grantedgrantedCritical
Publication of FR642401ApublicationCriticalpatent/FR642401A/fr
H04M1/00—Substation equipment, e.g. for use by subscribers
H04M1/26—Devices for calling a subscriber
H04M1/30—Devices which can set up and transmit only one digit at a time
H04M1/31—Devices which can set up and transmit only one digit at a time by interrupting current to generate trains of pulses; by periodically opening and closing contacts to generate trains of pulses
Landscapes
Engineering & Computer Science
(AREA)
Signal Processing
(AREA)
FR642401D1927-10-111927-10-11Transmetteur d'appel pour la téléphonie automatique
ExpiredFR642401A
(fr)