CA445444A - Circuit de sous-centrale telephonique - Google Patents

Circuit de sous-centrale telephonique

Info

Publication number
CA445444A
CA445444A CA445444A CA445444DA CA445444A CA 445444 A CA445444 A CA 445444A CA 445444 A CA445444 A CA 445444A CA 445444D A CA445444D A CA 445444DA CA 445444 A CA445444 A CA 445444A
Authority
CA
Canada
Prior art keywords
substation circuit
telephone substation
telephone
circuit
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
CA445444A
Other languages
English (en)
Inventor
H. Herrick Roswell
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 CA445444A publication Critical patent/CA445444A/fr
Expired legal-status Critical Current

Links

CA445444A Circuit de sous-centrale telephonique Expired CA445444A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA445444T

Publications (1)

Publication Number Publication Date
CA445444A true CA445444A (fr) 1947-12-09

Family

ID=35563099

Family Applications (1)

Application Number Title Priority Date Filing Date
CA445444A Expired CA445444A (fr) Circuit de sous-centrale telephonique

Country Status (1)

Country Link
CA (1) CA445444A (fr)

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