CA449628A - Circuit de sous-centrale telephonique - Google Patents

Circuit de sous-centrale telephonique

Info

Publication number
CA449628A
CA449628A CA449628A CA449628DA CA449628A CA 449628 A CA449628 A CA 449628A CA 449628 A CA449628 A CA 449628A CA 449628D A CA449628D A CA 449628DA CA 449628 A CA449628 A CA 449628A
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
CA449628A
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 CA449628A publication Critical patent/CA449628A/fr
Expired legal-status Critical Current

Links

CA449628A Circuit de sous-centrale telephonique Expired CA449628A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA449628T

Publications (1)

Publication Number Publication Date
CA449628A true CA449628A (fr) 1948-07-06

Family

ID=35567339

Family Applications (1)

Application Number Title Priority Date Filing Date
CA449628A Expired CA449628A (fr) Circuit de sous-centrale telephonique

Country Status (1)

Country Link
CA (1) CA449628A (fr)

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