CA441672A - Electrical signalling system - Google Patents

Electrical signalling system

Info

Publication number
CA441672A
CA441672A CA441672A CA441672DA CA441672A CA 441672 A CA441672 A CA 441672A CA 441672 A CA441672 A CA 441672A CA 441672D A CA441672D A CA 441672DA CA 441672 A CA441672 A CA 441672A
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
CA441672A
Other languages
French (fr)
Inventor
Norton Roseby Philip
Francis Mackensie 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 CA441672A publication Critical patent/CA441672A/en
Expired legal-status Critical Current

Links

CA441672A Electrical signalling system Expired CA441672A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA441672T

Publications (1)

Publication Number Publication Date
CA441672A true CA441672A (en) 1947-05-27

Family

ID=35556904

Family Applications (1)

Application Number Title Priority Date Filing Date
CA441672A Expired CA441672A (en) Electrical signalling system

Country Status (1)

Country Link
CA (1) CA441672A (en)

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