CA453798A - Telephone system - Google Patents

Telephone system

Info

Publication number
CA453798A
CA453798A CA453798A CA453798DA CA453798A CA 453798 A CA453798 A CA 453798A CA 453798 A CA453798 A CA 453798A CA 453798D A CA453798D A CA 453798DA CA 453798 A CA453798 A CA 453798A
Authority
CA
Canada
Prior art keywords
telephone system
telephone
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
CA453798A
Other languages
French (fr)
Inventor
Frederick Thomas
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
Publication date
Application granted granted Critical
Publication of CA453798A publication Critical patent/CA453798A/en
Expired legal-status Critical Current

Links

CA453798A Telephone system Expired CA453798A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA453798T

Publications (1)

Publication Number Publication Date
CA453798A true CA453798A (en) 1949-01-04

Family

ID=35571529

Family Applications (1)

Application Number Title Priority Date Filing Date
CA453798A Expired CA453798A (en) Telephone system

Country Status (1)

Country Link
CA (1) CA453798A (en)

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