CA172139A - Systeme d'echange telephonique - Google Patents

Systeme d'echange telephonique

Info

Publication number
CA172139A
CA172139A CA000172139A CA172139DA CA172139A CA 172139 A CA172139 A CA 172139A CA 000172139 A CA000172139 A CA 000172139A CA 172139D A CA172139D A CA 172139DA CA 172139 A CA172139 A CA 172139A
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
CA000172139A
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 CA172139A publication Critical patent/CA172139A/fr
Expired legal-status Critical Current

Links

CA000172139A 1915-07-28 1915-07-28 Systeme d'echange telephonique Expired CA172139A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA172139T 1915-07-28

Publications (1)

Publication Number Publication Date
CA172139A true CA172139A (fr) 1916-09-26

Family

ID=45291794

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000172139A Expired CA172139A (fr) 1915-07-28 1915-07-28 Systeme d'echange telephonique

Country Status (1)

Country Link
CA (1) CA172139A (fr)

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