CA216488A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA216488A
CA216488A CA216488A CA216488DA CA216488A CA 216488 A CA216488 A CA 216488A CA 216488 A CA216488 A CA 216488A CA 216488D A CA216488D A CA 216488DA CA 216488 A CA216488 A CA 216488A
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
CA216488A
Other languages
French (fr)
Inventor
P. Albert Walter
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 CA216488A publication Critical patent/CA216488A/en
Expired legal-status Critical Current

Links

CA216488A Telephone exchange system Expired CA216488A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA216488T

Publications (1)

Publication Number Publication Date
CA216488A true CA216488A (en) 1922-03-07

Family

ID=35110932

Family Applications (1)

Application Number Title Priority Date Filing Date
CA216488A Expired CA216488A (en) Telephone exchange system

Country Status (1)

Country Link
CA (1) CA216488A (en)

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