CA187554A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA187554A
CA187554A CA000187554A CA187554DA CA187554A CA 187554 A CA187554 A CA 187554A CA 000187554 A CA000187554 A CA 000187554A CA 187554D A CA187554D A CA 187554DA CA 187554 A CA187554 A CA 187554A
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
CA000187554A
Other languages
French (fr)
Inventor
Arthur B. Sperry
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
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of CA187554A publication Critical patent/CA187554A/en
Expired legal-status Critical Current

Links

CA000187554A 1918-02-15 1918-02-15 Telephone exchange system Expired CA187554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA187554T 1918-02-15

Publications (1)

Publication Number Publication Date
CA187554A true CA187554A (en) 1918-11-19

Family

ID=45307205

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000187554A Expired CA187554A (en) 1918-02-15 1918-02-15 Telephone exchange system

Country Status (1)

Country Link
CA (1) CA187554A (en)

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