CA504775A - Systemes de signalisation electrique - Google Patents

Systemes de signalisation electrique

Info

Publication number
CA504775A
CA504775A CA504775A CA504775DA CA504775A CA 504775 A CA504775 A CA 504775A CA 504775 A CA504775 A CA 504775A CA 504775D A CA504775D A CA 504775DA CA 504775 A CA504775 A CA 504775A
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
CA504775A
Other languages
English (en)
Inventor
G. Gordon-Wright John
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 CA504775A publication Critical patent/CA504775A/fr
Expired legal-status Critical Current

Links

CA504775A Systemes de signalisation electrique Expired CA504775A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA504775T

Publications (1)

Publication Number Publication Date
CA504775A true CA504775A (fr) 1954-08-03

Family

ID=35650697

Family Applications (1)

Application Number Title Priority Date Filing Date
CA504775A Expired CA504775A (fr) Systemes de signalisation electrique

Country Status (1)

Country Link
CA (1) CA504775A (fr)

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