CA175424A - Systeme d'echange telephonique - Google Patents

Systeme d'echange telephonique

Info

Publication number
CA175424A
CA175424A CA000175424A CA175424DA CA175424A CA 175424 A CA175424 A CA 175424A CA 000175424 A CA000175424 A CA 000175424A CA 175424D A CA175424D A CA 175424DA CA 175424 A CA175424 A CA 175424A
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
CA000175424A
Other languages
English (en)
Inventor
Charles Lane Goodrum
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 Inc
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 CA175424A publication Critical patent/CA175424A/fr
Expired legal-status Critical Current

Links

CA000175424A 1915-12-15 1915-12-15 Systeme d'echange telephonique Expired CA175424A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA175424T 1915-12-15

Publications (1)

Publication Number Publication Date
CA175424A true CA175424A (fr) 1917-02-27

Family

ID=45295077

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000175424A Expired CA175424A (fr) 1915-12-15 1915-12-15 Systeme d'echange telephonique

Country Status (1)

Country Link
CA (1) CA175424A (fr)

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