CA218939A - Telephone exchange system - Google Patents

Telephone exchange system

Info

Publication number
CA218939A
CA218939A CA218939A CA218939DA CA218939A CA 218939 A CA218939 A CA 218939A CA 218939 A CA218939 A CA 218939A CA 218939D A CA218939D A CA 218939DA CA 218939 A CA218939 A CA 218939A
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
CA218939A
Other languages
French (fr)
Inventor
Polinkowsky 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 CA218939A publication Critical patent/CA218939A/en
Expired legal-status Critical Current

Links

CA218939A Telephone exchange system Expired CA218939A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA218939T

Publications (1)

Publication Number Publication Date
CA218939A true CA218939A (en) 1922-05-23

Family

ID=35113383

Family Applications (1)

Application Number Title Priority Date Filing Date
CA218939A Expired CA218939A (en) Telephone exchange system

Country Status (1)

Country Link
CA (1) CA218939A (en)

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