CA68899A - Telephone switchboard signal - Google Patents

Telephone switchboard signal

Info

Publication number
CA68899A
CA68899A CA000068899A CA68899DA CA68899A CA 68899 A CA68899 A CA 68899A CA 000068899 A CA000068899 A CA 000068899A CA 68899D A CA68899D A CA 68899DA CA 68899 A CA68899 A CA 68899A
Authority
CA
Canada
Prior art keywords
telephone switchboard
switchboard signal
signal
telephone
switchboard
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
CA000068899A
Other languages
French (fr)
Inventor
Joseph John O'connor
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 CA68899A publication Critical patent/CA68899A/en
Expired legal-status Critical Current

Links

CA000068899A 1900-03-21 1900-03-21 Telephone switchboard signal Expired CA68899A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA68899T 1900-03-21

Publications (1)

Publication Number Publication Date
CA68899A true CA68899A (en) 1900-10-04

Family

ID=45185437

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000068899A Expired CA68899A (en) 1900-03-21 1900-03-21 Telephone switchboard signal

Country Status (1)

Country Link
CA (1) CA68899A (en)

Similar Documents

Publication Publication Date Title
CA66822A (en) Telephone switchboard signal
CA68899A (en) Telephone switchboard signal
CA69790A (en) Telephone signal
CA69861A (en) Telephone signal
CA68900A (en) Telephone switchboard
CA69862A (en) Telephone switchboard
CA72114A (en) Telephone switchboard signal
CA69755A (en) Telephone switch
CA60012A (en) Telephone switchboard signal
CA68723A (en) Telephone switchboard signal
CA68933A (en) Telephone switchboard signal
CA72113A (en) Telephone switchboard signal
CA74682A (en) Telephone circuit
CA66801A (en) Telephone
CA82775A (en) Telephone exchange signal
CA69671A (en) Telephone relay
CA67297A (en) Telephone transmitter
CA69922A (en) Telephone signal
CA74423A (en) Telephone signal
CA72883A (en) Electrical signal
CA92377A (en) Signal for telephone exchange
CA72974A (en) Signal for telephone trunk lines
CA72975A (en) Signal for telephone trunk lines
CA72112A (en) Telephone switchboard
CA81668A (en) Telephone switchboard