CA396070A - Systeme de signalisation telephonique - Google Patents

Systeme de signalisation telephonique

Info

Publication number
CA396070A
CA396070A CA396070A CA396070DA CA396070A CA 396070 A CA396070 A CA 396070A CA 396070 A CA396070 A CA 396070A CA 396070D A CA396070D A CA 396070DA CA 396070 A CA396070 A CA 396070A
Authority
CA
Canada
Prior art keywords
signalling system
telephone signalling
telephone
signalling
Prior art date
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.)
Expired
Application number
CA396070A
Other languages
English (en)
Inventor
Stephen Black Harold
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Publication date
Application granted granted Critical
Publication of CA396070A publication Critical patent/CA396070A/fr
Expired legal-status Critical Current

Links

CA396070A Systeme de signalisation telephonique Expired CA396070A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA396070T

Publications (1)

Publication Number Publication Date
CA396070A true CA396070A (fr) 1941-04-22

Family

ID=35403511

Family Applications (1)

Application Number Title Priority Date Filing Date
CA396070A Expired CA396070A (fr) Systeme de signalisation telephonique

Country Status (1)

Country Link
CA (1) CA396070A (fr)

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