CA515177A - Electrical signalling systems - Google Patents

Electrical signalling systems

Info

Publication number
CA515177A
CA515177A CA515177A CA515177DA CA515177A CA 515177 A CA515177 A CA 515177A CA 515177 A CA515177 A CA 515177A CA 515177D A CA515177D A CA 515177DA CA 515177 A CA515177 A CA 515177A
Authority
CA
Canada
Prior art keywords
signalling systems
electrical signalling
electrical
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
CA515177A
Other languages
French (fr)
Inventor
Davison Alan
Threadgold Ronald
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
Publication date
Application granted granted Critical
Publication of CA515177A publication Critical patent/CA515177A/en
Expired legal-status Critical Current

Links

CA515177A Electrical signalling systems Expired CA515177A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA515177T

Publications (1)

Publication Number Publication Date
CA515177A true CA515177A (en) 1955-08-02

Family

ID=35666268

Family Applications (1)

Application Number Title Priority Date Filing Date
CA515177A Expired CA515177A (en) Electrical signalling systems

Country Status (1)

Country Link
CA (1) CA515177A (en)

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