CA382808A - Direct current signalling system - Google Patents

Direct current signalling system

Info

Publication number
CA382808A
CA382808A CA382808A CA382808DA CA382808A CA 382808 A CA382808 A CA 382808A CA 382808 A CA382808 A CA 382808A CA 382808D A CA382808D A CA 382808DA CA 382808 A CA382808 A CA 382808A
Authority
CA
Canada
Prior art keywords
direct current
signalling system
current signalling
direct
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
CA382808A
Other languages
French (fr)
Inventor
J. Mccarthy Edward
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.)
Gamewell Corp
Original Assignee
Gamewell Corp
Publication date
Application granted granted Critical
Publication of CA382808A publication Critical patent/CA382808A/en
Expired legal-status Critical Current

Links

CA382808A Direct current signalling system Expired CA382808A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA382808T

Publications (1)

Publication Number Publication Date
CA382808A true CA382808A (en) 1939-07-18

Family

ID=35388040

Family Applications (1)

Application Number Title Priority Date Filing Date
CA382808A Expired CA382808A (en) Direct current signalling system

Country Status (1)

Country Link
CA (1) CA382808A (en)

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