CA74719A - Signal pour echange de telephone - Google Patents

Signal pour echange de telephone

Info

Publication number
CA74719A
CA74719A CA000074719A CA74719DA CA74719A CA 74719 A CA74719 A CA 74719A CA 000074719 A CA000074719 A CA 000074719A CA 74719D A CA74719D A CA 74719DA CA 74719 A CA74719 A CA 74719A
Authority
CA
Canada
Prior art keywords
telephone switchboard
call
switchboard call
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
CA000074719A
Other languages
English (en)
Inventor
Frank Robert Mcberty
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 CA74719A publication Critical patent/CA74719A/fr
Expired legal-status Critical Current

Links

CA000074719A 1898-09-14 1898-09-14 Signal pour echange de telephone Expired CA74719A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA74719T 1898-09-14

Publications (1)

Publication Number Publication Date
CA74719A true CA74719A (fr) 1902-02-11

Family

ID=45191255

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000074719A Expired CA74719A (fr) 1898-09-14 1898-09-14 Signal pour echange de telephone

Country Status (1)

Country Link
CA (1) CA74719A (fr)

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