CA299410A - Systeme electrique de signalisation - Google Patents

Systeme electrique de signalisation

Info

Publication number
CA299410A
CA299410A CA299410A CA299410DA CA299410A CA 299410 A CA299410 A CA 299410A CA 299410 A CA299410 A CA 299410A CA 299410D A CA299410D A CA 299410DA CA 299410 A CA299410 A CA 299410A
Authority
CA
Canada
Prior art keywords
signalling system
electric signalling
electric
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
CA299410A
Other languages
English (en)
Inventor
Stephen Black Harold
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Publication date
Application granted granted Critical
Publication of CA299410A publication Critical patent/CA299410A/fr
Expired legal-status Critical Current

Links

CA299410A Systeme electrique de signalisation Expired CA299410A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA299410T

Publications (1)

Publication Number Publication Date
CA299410A true CA299410A (fr) 1930-04-15

Family

ID=35236729

Family Applications (1)

Application Number Title Priority Date Filing Date
CA299410A Expired CA299410A (fr) Systeme electrique de signalisation

Country Status (1)

Country Link
CA (1) CA299410A (fr)

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