CA196686A - Electric signalling system - Google Patents

Electric signalling system

Info

Publication number
CA196686A
CA196686A CA196686A CA196686DA CA196686A CA 196686 A CA196686 A CA 196686A CA 196686 A CA196686 A CA 196686A CA 196686D A CA196686D A CA 196686DA CA 196686 A CA196686 A CA 196686A
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
CA196686A
Other languages
French (fr)
Inventor
N. Reeves Frank
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 CA196686A publication Critical patent/CA196686A/en
Expired legal-status Critical Current

Links

CA196686A Electric signalling system Expired CA196686A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA196686T

Publications (1)

Publication Number Publication Date
CA196686A true CA196686A (en) 1920-01-27

Family

ID=35071124

Family Applications (1)

Application Number Title Priority Date Filing Date
CA196686A Expired CA196686A (en) Electric signalling system

Country Status (1)

Country Link
CA (1) CA196686A (en)

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