CA174337A - Systeme d'echange telephonique - Google Patents

Systeme d'echange telephonique

Info

Publication number
CA174337A
CA174337A CA000174337A CA174337DA CA174337A CA 174337 A CA174337 A CA 174337A CA 000174337 A CA000174337 A CA 000174337A CA 174337D A CA174337D A CA 174337DA CA 174337 A CA174337 A CA 174337A
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
CA000174337A
Other languages
English (en)
Inventor
Lewis Howes Johnson
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 CA174337A publication Critical patent/CA174337A/fr
Expired legal-status Critical Current

Links

CA000174337A 1916-05-03 1916-05-03 Systeme d'echange telephonique Expired CA174337A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA174337T 1916-05-03

Publications (1)

Publication Number Publication Date
CA174337A true CA174337A (fr) 1917-01-02

Family

ID=45293990

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000174337A Expired CA174337A (fr) 1916-05-03 1916-05-03 Systeme d'echange telephonique

Country Status (1)

Country Link
CA (1) CA174337A (fr)

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