CA309966A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA309966A
CA309966A CA309966A CA309966DA CA309966A CA 309966 A CA309966 A CA 309966A CA 309966 A CA309966 A CA 309966A CA 309966D A CA309966D A CA 309966DA CA 309966 A CA309966 A CA 309966A
Authority
CA
Canada
Prior art keywords
exchange system
telephone exchange
telephone
exchange
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
CA309966A
Other languages
French (fr)
Inventor
Hutchinson Williford Oscar
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 CA309966A publication Critical patent/CA309966A/en
Expired legal-status Critical Current

Links

CA309966A Telephone exchange system Expired CA309966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA309966T

Publications (1)

Publication Number Publication Date
CA309966A true CA309966A (en) 1931-03-31

Family

ID=35269290

Family Applications (1)

Application Number Title Priority Date Filing Date
CA309966A Expired CA309966A (en) Telephone exchange system

Country Status (1)

Country Link
CA (1) CA309966A (en)

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