CA471737A - Electrical signalling systems - Google Patents

Electrical signalling systems

Info

Publication number
CA471737A
CA471737A CA471737A CA471737DA CA471737A CA 471737 A CA471737 A CA 471737A CA 471737 A CA471737 A CA 471737A CA 471737D A CA471737D A CA 471737DA CA 471737 A CA471737 A CA 471737A
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
CA471737A
Other languages
French (fr)
Inventor
Saville Willie
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 CA471737A publication Critical patent/CA471737A/en
Expired legal-status Critical Current

Links

CA471737A Electrical signalling systems Expired CA471737A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA471737T

Publications (1)

Publication Number Publication Date
CA471737A true CA471737A (en) 1951-02-27

Family

ID=35605687

Family Applications (1)

Application Number Title Priority Date Filing Date
CA471737A Expired CA471737A (en) Electrical signalling systems

Country Status (1)

Country Link
CA (1) CA471737A (en)

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