CA382143A - Telephone signalling apparatus - Google Patents

Telephone signalling apparatus

Info

Publication number
CA382143A
CA382143A CA382143A CA382143DA CA382143A CA 382143 A CA382143 A CA 382143A CA 382143 A CA382143 A CA 382143A CA 382143D A CA382143D A CA 382143DA CA 382143 A CA382143 A CA 382143A
Authority
CA
Canada
Prior art keywords
signalling apparatus
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
CA382143A
Other languages
French (fr)
Inventor
Charles Riebe Theodore
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.)
Associated Telephone and Telegraph Co
Original Assignee
Associated Telephone and Telegraph Co
Publication date
Application granted granted Critical
Publication of CA382143A publication Critical patent/CA382143A/en
Expired legal-status Critical Current

Links

CA382143A Telephone signalling apparatus Expired CA382143A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA382143T

Publications (1)

Publication Number Publication Date
CA382143A true CA382143A (en) 1939-06-20

Family

ID=35387377

Family Applications (1)

Application Number Title Priority Date Filing Date
CA382143A Expired CA382143A (en) Telephone signalling apparatus

Country Status (1)

Country Link
CA (1) CA382143A (en)

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