CA66800A - Supervisory signal for telephone switchboards - Google Patents

Supervisory signal for telephone switchboards

Info

Publication number
CA66800A
CA66800A CA000066800A CA66800DA CA66800A CA 66800 A CA66800 A CA 66800A CA 000066800 A CA000066800 A CA 000066800A CA 66800D A CA66800D A CA 66800DA CA 66800 A CA66800 A CA 66800A
Authority
CA
Canada
Prior art keywords
supervisory signal
telephone switchboards
switchboards
telephone
supervisory
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
CA000066800A
Other languages
French (fr)
Inventor
Charles Ezra Scribner
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 CA66800A publication Critical patent/CA66800A/en
Expired legal-status Critical Current

Links

CA000066800A 1898-05-27 1898-05-27 Supervisory signal for telephone switchboards Expired CA66800A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA66800T 1898-05-27

Publications (1)

Publication Number Publication Date
CA66800A true CA66800A (en) 1900-03-29

Family

ID=45183338

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000066800A Expired CA66800A (en) 1898-05-27 1898-05-27 Supervisory signal for telephone switchboards

Country Status (1)

Country Link
CA (1) CA66800A (en)

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