CA740065A - Telephone signalling systems - Google Patents

Telephone signalling systems

Info

Publication number
CA740065A
CA740065A CA740065A CA740065DA CA740065A CA 740065 A CA740065 A CA 740065A CA 740065 A CA740065 A CA 740065A CA 740065D A CA740065D A CA 740065DA CA 740065 A CA740065 A CA 740065A
Authority
CA
Canada
Prior art keywords
signalling systems
telephone signalling
telephone
systems
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
CA740065A
Inventor
Vogel Georg
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.)
International Telephone and Telegraph Corp
Original Assignee
International Telephone and Telegraph Corp
Publication date
Application granted granted Critical
Publication of CA740065A publication Critical patent/CA740065A/en
Expired legal-status Critical Current

Links

CA740065A Telephone signalling systems Expired CA740065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA740065T

Publications (1)

Publication Number Publication Date
CA740065A true CA740065A (en) 1966-08-02

Family

ID=36169238

Family Applications (1)

Application Number Title Priority Date Filing Date
CA740065A Expired CA740065A (en) Telephone signalling systems

Country Status (1)

Country Link
CA (1) CA740065A (en)

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