CA290850A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA290850A
CA290850A CA290850A CA290850DA CA290850A CA 290850 A CA290850 A CA 290850A CA 290850 A CA290850 A CA 290850A CA 290850D A CA290850D A CA 290850DA CA 290850 A CA290850 A CA 290850A
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
CA290850A
Other languages
French (fr)
Inventor
G. Dunham Bert
T. Haines William
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 CA290850A publication Critical patent/CA290850A/en
Expired legal-status Critical Current

Links

CA290850A Telephone exchange system Expired CA290850A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA290850T

Publications (1)

Publication Number Publication Date
CA290850A true CA290850A (en) 1929-06-25

Family

ID=35227662

Family Applications (1)

Application Number Title Priority Date Filing Date
CA290850A Expired CA290850A (en) Telephone exchange system

Country Status (1)

Country Link
CA (1) CA290850A (en)

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