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AU112348B2 - Improvements in electrical signalling systems - Google Patents
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AU112348B2 - Improvements in electrical signalling systems - Google Patents

Improvements in electrical signalling systems

Info

Publication number
AU112348B2
AU112348B2 AU207/40A AU20740A AU112348B2 AU 112348 B2 AU112348 B2 AU 112348B2 AU 207/40 A AU207/40 A AU 207/40A AU 20740 A AU20740 A AU 20740A AU 112348 B2 AU112348 B2 AU 112348B2
Authority
AU
Australia
Prior art keywords
signalling systems
electrical signalling
electrical
systems
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
AU207/40A
Other versions
AU20740A (en
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
Filing date
Publication date
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Application granted granted Critical
Publication of AU20740A publication Critical patent/AU20740A/en
Publication of AU112348B2 publication Critical patent/AU112348B2/en
Expired legal-status Critical Current

Links

AU207/40A 1940-01-18 Improvements in electrical signalling systems Expired AU112348B2 (en)

Publications (2)

Publication Number Publication Date
AU20740A AU20740A (en) 1941-01-30
AU112348B2 true AU112348B2 (en) 1941-01-30

Family

ID=

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