CA423902A - Electrical signalling system - Google Patents

Electrical signalling system

Info

Publication number
CA423902A
CA423902A CA423902A CA423902DA CA423902A CA 423902 A CA423902 A CA 423902A CA 423902 A CA423902 A CA 423902A CA 423902D A CA423902D A CA 423902DA CA 423902 A CA423902 A CA 423902A
Authority
CA
Canada
Prior art keywords
signalling system
electrical signalling
electrical
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
CA423902A
Other languages
French (fr)
Inventor
Francis Mackenzie 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 CA423902A publication Critical patent/CA423902A/en
Expired legal-status Critical Current

Links

CA423902A Electrical signalling system Expired CA423902A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA423902T

Publications (1)

Publication Number Publication Date
CA423902A true CA423902A (en) 1944-11-21

Family

ID=35534913

Family Applications (1)

Application Number Title Priority Date Filing Date
CA423902A Expired CA423902A (en) Electrical signalling system

Country Status (1)

Country Link
CA (1) CA423902A (en)

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