CA504719A - Subscriber signalling systems - Google Patents

Subscriber signalling systems

Info

Publication number
CA504719A
CA504719A CA504719A CA504719DA CA504719A CA 504719 A CA504719 A CA 504719A CA 504719 A CA504719 A CA 504719A CA 504719D A CA504719D A CA 504719DA CA 504719 A CA504719 A CA 504719A
Authority
CA
Canada
Prior art keywords
signalling systems
subscriber signalling
subscriber
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
CA504719A
Other languages
French (fr)
Inventor
O. Gray Richard
M. Roschke Erwin
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.)
Zenith Electronics LLC
Original Assignee
Zenith Radio Corp
Publication date
Application granted granted Critical
Publication of CA504719A publication Critical patent/CA504719A/en
Expired legal-status Critical Current

Links

CA504719A Subscriber signalling systems Expired CA504719A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA504719T

Publications (1)

Publication Number Publication Date
CA504719A true CA504719A (en) 1954-07-27

Family

ID=35650641

Family Applications (1)

Application Number Title Priority Date Filing Date
CA504719A Expired CA504719A (en) Subscriber signalling systems

Country Status (1)

Country Link
CA (1) CA504719A (en)

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