AU491038A - Improvements in electrical signalling systems - Google Patents

Improvements in electrical signalling systems

Info

Publication number
AU491038A
AU491038A AU4910/38A AU491038A AU491038A AU 491038 A AU491038 A AU 491038A AU 4910/38 A AU4910/38 A AU 4910/38A AU 491038 A AU491038 A AU 491038A AU 491038 A AU491038 A AU 491038A
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
AU4910/38A
Other versions
AU107981B2 (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 AU491038A publication Critical patent/AU491038A/en
Publication of AU107981B2 publication Critical patent/AU107981B2/en
Expired legal-status Critical Current

Links

AU4910/38A 1938-11-08 Improvements in electrical signalling systems Expired AU107981B2 (en)

Publications (2)

Publication Number Publication Date
AU491038A true AU491038A (en) 1939-07-27
AU107981B2 AU107981B2 (en) 1939-07-27

Family

ID=

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