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AU138142B2 - Improvements in or relating to electric signalling and to visual indication - Google Patents
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AU138142B2 - Improvements in or relating to electric signalling and to visual indication - Google Patents

Improvements in or relating to electric signalling and to visual indication

Info

Publication number
AU138142B2
AU138142B2 AU11228/47A AU1122847A AU138142B2 AU 138142 B2 AU138142 B2 AU 138142B2 AU 11228/47 A AU11228/47 A AU 11228/47A AU 1122847 A AU1122847 A AU 1122847A AU 138142 B2 AU138142 B2 AU 138142B2
Authority
AU
Australia
Prior art keywords
relating
visual indication
electric signalling
signalling
electric
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
AU11228/47A
Other versions
AU1122847A (en
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of AU1122847A publication Critical patent/AU1122847A/en
Publication of AU138142B2 publication Critical patent/AU138142B2/en
Expired legal-status Critical Current

Links

AU11228/47A 1947-04-03 Improvements in or relating to electric signalling and to visual indication Expired AU138142B2 (en)

Publications (2)

Publication Number Publication Date
AU1122847A AU1122847A (en) 1947-05-01
AU138142B2 true AU138142B2 (en) 1947-05-01

Family

ID=

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