CA415420A - Alternating current signalling system - Google Patents

Alternating current signalling system

Info

Publication number
CA415420A
CA415420A CA415420A CA415420DA CA415420A CA 415420 A CA415420 A CA 415420A CA 415420 A CA415420 A CA 415420A CA 415420D A CA415420D A CA 415420DA CA 415420 A CA415420 A CA 415420A
Authority
CA
Canada
Prior art keywords
alternating current
signalling system
current signalling
alternating
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
CA415420A
Other languages
French (fr)
Inventor
Morton Hadfield Bertram
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 Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
Publication date
Application granted granted Critical
Publication of CA415420A publication Critical patent/CA415420A/en
Expired legal-status Critical Current

Links

CA415420A Alternating current signalling system Expired CA415420A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA415420T

Publications (1)

Publication Number Publication Date
CA415420A true CA415420A (en) 1943-09-28

Family

ID=35524629

Family Applications (1)

Application Number Title Priority Date Filing Date
CA415420A Expired CA415420A (en) Alternating current signalling system

Country Status (1)

Country Link
CA (1) CA415420A (en)

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