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AU112191B2 - Improvements in responding apparatus for use in electrical signalling systems - Google Patents
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AU112191B2 - Improvements in responding apparatus for use in electrical signalling systems - Google Patents

Improvements in responding apparatus for use in electrical signalling systems

Info

Publication number
AU112191B2
AU112191B2 AU231/40A AU23140A AU112191B2 AU 112191 B2 AU112191 B2 AU 112191B2 AU 231/40 A AU231/40 A AU 231/40A AU 23140 A AU23140 A AU 23140A AU 112191 B2 AU112191 B2 AU 112191B2
Authority
AU
Australia
Prior art keywords
signalling systems
electrical signalling
responding apparatus
responding
electrical
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
AU231/40A
Other versions
AU23140A (en
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
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 AU23140A publication Critical patent/AU23140A/en
Publication of AU112191B2 publication Critical patent/AU112191B2/en
Expired legal-status Critical Current

Links

AU231/40A 1940-01-19 Improvements in responding apparatus for use in electrical signalling systems Expired AU112191B2 (en)

Publications (2)

Publication Number Publication Date
AU23140A AU23140A (en) 1941-01-09
AU112191B2 true AU112191B2 (en) 1941-01-09

Family

ID=

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