CA440020A - Telephone switch and system - Google Patents

Telephone switch and system

Info

Publication number
CA440020A
CA440020A CA440020A CA440020DA CA440020A CA 440020 A CA440020 A CA 440020A CA 440020 A CA440020 A CA 440020A CA 440020D A CA440020D A CA 440020DA CA 440020 A CA440020 A CA 440020A
Authority
CA
Canada
Prior art keywords
telephone switch
telephone
switch
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
CA440020A
Other languages
French (fr)
Inventor
I. Bellamy John
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.)
Kellogg Switchboard and Supply Co
Original Assignee
Kellogg Switchboard and Supply Co
Publication date
Application granted granted Critical
Publication of CA440020A publication Critical patent/CA440020A/en
Expired legal-status Critical Current

Links

CA440020A Telephone switch and system Expired CA440020A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA440020T

Publications (1)

Publication Number Publication Date
CA440020A true CA440020A (en) 1947-03-04

Family

ID=35555254

Family Applications (1)

Application Number Title Priority Date Filing Date
CA440020A Expired CA440020A (en) Telephone switch and system

Country Status (1)

Country Link
CA (1) CA440020A (en)

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