CA196187A - Systeme d'echange telephonique - Google Patents

Systeme d'echange telephonique

Info

Publication number
CA196187A
CA196187A CA196187A CA196187DA CA196187A CA 196187 A CA196187 A CA 196187A CA 196187 A CA196187 A CA 196187A CA 196187D A CA196187D A CA 196187DA CA 196187 A CA196187 A CA 196187A
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
CA196187A
Other languages
English (en)
Inventor
B. Sperry Arthur
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
Publication date
Application granted granted Critical
Publication of CA196187A publication Critical patent/CA196187A/fr
Expired legal-status Critical Current

Links

CA196187A Systeme d'echange telephonique Expired CA196187A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA196187T

Publications (1)

Publication Number Publication Date
CA196187A true CA196187A (fr) 1920-01-13

Family

ID=35065495

Family Applications (1)

Application Number Title Priority Date Filing Date
CA196187A Expired CA196187A (fr) Systeme d'echange telephonique

Country Status (1)

Country Link
CA (1) CA196187A (fr)

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