CA228574A - Systeme d'echange telephonique - Google Patents

Systeme d'echange telephonique

Info

Publication number
CA228574A
CA228574A CA228574A CA228574DA CA228574A CA 228574 A CA228574 A CA 228574A CA 228574 A CA228574 A CA 228574A CA 228574D A CA228574D A CA 228574DA CA 228574 A CA228574 A CA 228574A
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
CA228574A
Other languages
English (en)
Inventor
E. Lundell Alben
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.)
INTERNATIONAL WESTERN ELECTRIC Co
Original Assignee
INTERNATIONAL WESTERN ELECTRIC Co
Publication date
Application granted granted Critical
Publication of CA228574A publication Critical patent/CA228574A/fr
Expired legal-status Critical Current

Links

CA228574A Systeme d'echange telephonique Expired CA228574A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA228574T

Publications (1)

Publication Number Publication Date
CA228574A true CA228574A (fr) 1923-02-06

Family

ID=35124177

Family Applications (1)

Application Number Title Priority Date Filing Date
CA228574A Expired CA228574A (fr) Systeme d'echange telephonique

Country Status (1)

Country Link
CA (1) CA228574A (fr)

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