CA72975A - Signal pour lignes de telephones - Google Patents

Signal pour lignes de telephones

Info

Publication number
CA72975A
CA72975A CA000072975A CA72975DA CA72975A CA 72975 A CA72975 A CA 72975A CA 000072975 A CA000072975 A CA 000072975A CA 72975D A CA72975D A CA 72975DA CA 72975 A CA72975 A CA 72975A
Authority
CA
Canada
Prior art keywords
signal
trunk lines
telephone trunk
telephone
lines
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
CA000072975A
Other languages
English (en)
Inventor
Henry Middlebrook Crane
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.)
Bell Telephone Company of Canada
Original Assignee
Bell Telephone Company of Canada
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Bell Telephone Company of Canada filed Critical Bell Telephone Company of Canada
Application granted granted Critical
Publication of CA72975A publication Critical patent/CA72975A/fr
Expired legal-status Critical Current

Links

CA000072975A 1901-01-10 1901-01-10 Signal pour lignes de telephones Expired CA72975A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA72975T 1901-01-10

Publications (1)

Publication Number Publication Date
CA72975A true CA72975A (fr) 1901-09-03

Family

ID=45189512

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000072975A Expired CA72975A (fr) 1901-01-10 1901-01-10 Signal pour lignes de telephones

Country Status (1)

Country Link
CA (1) CA72975A (fr)

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