CA478159A - Telephone exchange systems - Google Patents

Telephone exchange systems

Info

Publication number
CA478159A
CA478159A CA478159A CA478159DA CA478159A CA 478159 A CA478159 A CA 478159A CA 478159 A CA478159 A CA 478159A CA 478159D A CA478159D A CA 478159DA CA 478159 A CA478159 A CA 478159A
Authority
CA
Canada
Prior art keywords
telephone exchange
exchange systems
systems
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
CA478159A
Other languages
French (fr)
Inventor
Deakin Gerald
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 Standard Electric Corp
Original Assignee
International Standard Electric Corp
Publication date
Application granted granted Critical
Publication of CA478159A publication Critical patent/CA478159A/en
Expired legal-status Critical Current

Links

CA478159A Telephone exchange systems Expired CA478159A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA478159T

Publications (1)

Publication Number Publication Date
CA478159A true CA478159A (en) 1951-10-30

Family

ID=35617813

Family Applications (1)

Application Number Title Priority Date Filing Date
CA478159A Expired CA478159A (en) Telephone exchange systems

Country Status (1)

Country Link
CA (1) CA478159A (en)

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