CA216851A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA216851A
CA216851A CA216851A CA216851DA CA216851A CA 216851 A CA216851 A CA 216851A CA 216851 A CA216851 A CA 216851A CA 216851D A CA216851D A CA 216851DA CA 216851 A CA216851 A CA 216851A
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
CA216851A
Other languages
French (fr)
Inventor
Polinowsky Lipa
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 CA216851A publication Critical patent/CA216851A/en
Expired legal-status Critical Current

Links

CA216851A Telephone exchange system Expired CA216851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA216851T

Publications (1)

Publication Number Publication Date
CA216851A true CA216851A (en) 1922-03-14

Family

ID=35111295

Family Applications (1)

Application Number Title Priority Date Filing Date
CA216851A Expired CA216851A (en) Telephone exchange system

Country Status (1)

Country Link
CA (1) CA216851A (en)

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