CA219438A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA219438A
CA219438A CA219438A CA219438DA CA219438A CA 219438 A CA219438 A CA 219438A CA 219438 A CA219438 A CA 219438A CA 219438D A CA219438D A CA 219438DA CA 219438 A CA219438 A CA 219438A
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
CA219438A
Other languages
French (fr)
Inventor
Polinskowsky 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 CA219438A publication Critical patent/CA219438A/en
Expired legal-status Critical Current

Links

CA219438A Telephone exchange system Expired CA219438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA219438T

Publications (1)

Publication Number Publication Date
CA219438A true CA219438A (en) 1922-06-06

Family

ID=35113882

Family Applications (1)

Application Number Title Priority Date Filing Date
CA219438A Expired CA219438A (en) Telephone exchange system

Country Status (1)

Country Link
CA (1) CA219438A (en)

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