CA517448A - Subscriber signalling system - Google Patents

Subscriber signalling system

Info

Publication number
CA517448A
CA517448A CA517448A CA517448DA CA517448A CA 517448 A CA517448 A CA 517448A CA 517448 A CA517448 A CA 517448A CA 517448D A CA517448D A CA 517448DA CA 517448 A CA517448 A CA 517448A
Authority
CA
Canada
Prior art keywords
signalling system
subscriber signalling
subscriber
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
CA517448A
Other languages
French (fr)
Inventor
H. Herrick Roswell
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 CA517448A publication Critical patent/CA517448A/en
Expired legal-status Critical Current

Links

CA517448A Subscriber signalling system Expired CA517448A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA517448T

Publications (1)

Publication Number Publication Date
CA517448A true CA517448A (en) 1955-10-11

Family

ID=35670643

Family Applications (1)

Application Number Title Priority Date Filing Date
CA517448A Expired CA517448A (en) Subscriber signalling system

Country Status (1)

Country Link
CA (1) CA517448A (en)

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