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CA151918A - Telephone signalling system - Google Patents

Telephone signalling system

Info

Publication number
CA151918A
CA151918A CA000151918A CA151918DA CA151918A CA 151918 A CA151918 A CA 151918A CA 000151918 A CA000151918 A CA 000151918A CA 151918D A CA151918D A CA 151918DA CA 151918 A CA151918 A CA 151918A
Authority
CA
Canada
Prior art keywords
signalling system
telephone signalling
telephone
signalling
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
CA000151918A
Other languages
French (fr)
Inventor
Charles Howard North
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of CA151918A publication Critical patent/CA151918A/en
Expired legal-status Critical Current

Links

CA000151918A 1912-05-29 1912-05-29 Telephone signalling system Expired CA151918A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA151918T 1912-05-29

Publications (1)

Publication Number Publication Date
CA151918A true CA151918A (en) 1913-11-18

Family

ID=45271630

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000151918A Expired CA151918A (en) 1912-05-29 1912-05-29 Telephone signalling system

Country Status (1)

Country Link
CA (1) CA151918A (en)

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