CA415423A - Telephone substation apparatus - Google Patents

Telephone substation apparatus

Info

Publication number
CA415423A
CA415423A CA415423A CA415423DA CA415423A CA 415423 A CA415423 A CA 415423A CA 415423 A CA415423 A CA 415423A CA 415423D A CA415423D A CA 415423DA CA 415423 A CA415423 A CA 415423A
Authority
CA
Canada
Prior art keywords
substation apparatus
telephone substation
telephone
substation
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
CA415423A
Other languages
French (fr)
Inventor
Frederick Obergfell Herbert
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
Associated Telephone and Telegraph Co
Original Assignee
Automatic Electric Laboratories Inc
Associated Telephone and Telegraph Co
Publication date
Application granted granted Critical
Publication of CA415423A publication Critical patent/CA415423A/en
Expired legal-status Critical Current

Links

CA415423A Telephone substation apparatus Expired CA415423A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA415423T

Publications (1)

Publication Number Publication Date
CA415423A true CA415423A (en) 1943-09-28

Family

ID=35524632

Family Applications (1)

Application Number Title Priority Date Filing Date
CA415423A Expired CA415423A (en) Telephone substation apparatus

Country Status (1)

Country Link
CA (1) CA415423A (en)

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