CA190056A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA190056A
CA190056A CA000190056A CA190056DA CA190056A CA 190056 A CA190056 A CA 190056A CA 000190056 A CA000190056 A CA 000190056A CA 190056D A CA190056D A CA 190056DA CA 190056 A CA190056 A CA 190056A
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
CA000190056A
Other languages
French (fr)
Inventor
Frederick E. Anderson
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 CA190056A publication Critical patent/CA190056A/en
Expired legal-status Critical Current

Links

CA000190056A 1918-03-04 1918-03-04 Telephone exchange system Expired CA190056A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA190056T 1918-03-04

Publications (1)

Publication Number Publication Date
CA190056A true CA190056A (en) 1919-04-29

Family

ID=45309707

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000190056A Expired CA190056A (en) 1918-03-04 1918-03-04 Telephone exchange system

Country Status (1)

Country Link
CA (1) CA190056A (en)

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