CA177248A - Systeme d'echange telephonique - Google Patents

Systeme d'echange telephonique

Info

Publication number
CA177248A
CA177248A CA000177248A CA177248DA CA177248A CA 177248 A CA177248 A CA 177248A CA 000177248 A CA000177248 A CA 000177248A CA 177248D A CA177248D A CA 177248DA CA 177248 A CA177248 A CA 177248A
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
CA000177248A
Other languages
English (en)
Inventor
Alben Emmanuel Lundell
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 CA177248A publication Critical patent/CA177248A/fr
Expired legal-status Critical Current

Links

CA000177248A 1917-02-20 1917-02-20 Systeme d'echange telephonique Expired CA177248A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA177248T 1917-02-20

Publications (1)

Publication Number Publication Date
CA177248A true CA177248A (fr) 1917-05-22

Family

ID=45296901

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000177248A Expired CA177248A (fr) 1917-02-20 1917-02-20 Systeme d'echange telephonique

Country Status (1)

Country Link
CA (1) CA177248A (fr)

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