CA13007A - Improvements on telephone signal apparatus - Google Patents

Improvements on telephone signal apparatus

Info

Publication number
CA13007A
CA13007A CA000013007A CA13007DA CA13007A CA 13007 A CA13007 A CA 13007A CA 000013007 A CA000013007 A CA 000013007A CA 13007D A CA13007D A CA 13007DA CA 13007 A CA13007 A CA 13007A
Authority
CA
Canada
Prior art keywords
telephone signal
signal apparatus
telephone
signal
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
CA000013007A
Other languages
French (fr)
Inventor
Thomas A. Watson
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.)
CANADIAN TELEPHONE Co
Original Assignee
CANADIAN TELEPHONE Co
Publication date
Application granted granted Critical
Publication of CA13007A publication Critical patent/CA13007A/en
Expired legal-status Critical Current

Links

CA000013007A Improvements on telephone signal apparatus Expired CA13007A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA13007T

Publications (1)

Publication Number Publication Date
CA13007A true CA13007A (en) 1881-06-16

Family

ID=45129552

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000013007A Expired CA13007A (en) Improvements on telephone signal apparatus

Country Status (1)

Country Link
CA (1) CA13007A (en)

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