CA170970A - Systeme d'echange telephonique - Google Patents

Systeme d'echange telephonique

Info

Publication number
CA170970A
CA170970A CA000170970A CA170970DA CA170970A CA 170970 A CA170970 A CA 170970A CA 000170970 A CA000170970 A CA 000170970A CA 170970D A CA170970D A CA 170970DA CA 170970 A CA170970 A CA 170970A
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
CA000170970A
Other languages
English (en)
Inventor
Henry Peter Clausen
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 CA170970A publication Critical patent/CA170970A/fr
Expired legal-status Critical Current

Links

CA000170970A 1915-04-03 1915-04-03 Systeme d'echange telephonique Expired CA170970A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA170970T 1915-04-03

Publications (1)

Publication Number Publication Date
CA170970A true CA170970A (fr) 1916-07-25

Family

ID=45290632

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000170970A Expired CA170970A (fr) 1915-04-03 1915-04-03 Systeme d'echange telephonique

Country Status (1)

Country Link
CA (1) CA170970A (fr)

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