CA385260A - Telephone signalling system - Google Patents

Telephone signalling system

Info

Publication number
CA385260A
CA385260A CA385260A CA385260DA CA385260A CA 385260 A CA385260 A CA 385260A CA 385260 A CA385260 A CA 385260A CA 385260D A CA385260D A CA 385260DA CA 385260 A CA385260 A CA 385260A
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
CA385260A
Other languages
French (fr)
Inventor
Kendall Low Frank
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 CA385260A publication Critical patent/CA385260A/en
Expired legal-status Critical Current

Links

CA385260A Telephone signalling system Expired CA385260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA385260T

Publications (1)

Publication Number Publication Date
CA385260A true CA385260A (en) 1939-11-21

Family

ID=35390483

Family Applications (1)

Application Number Title Priority Date Filing Date
CA385260A Expired CA385260A (en) Telephone signalling system

Country Status (1)

Country Link
CA (1) CA385260A (en)

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