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AU112952B2 - Improvements in or relating to combined aural and visual signalling systems - Google Patents
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AU112952B2 - Improvements in or relating to combined aural and visual signalling systems - Google Patents

Improvements in or relating to combined aural and visual signalling systems

Info

Publication number
AU112952B2
AU112952B2 AU1537/40A AU153740A AU112952B2 AU 112952 B2 AU112952 B2 AU 112952B2 AU 1537/40 A AU1537/40 A AU 1537/40A AU 153740 A AU153740 A AU 153740A AU 112952 B2 AU112952 B2 AU 112952B2
Authority
AU
Australia
Prior art keywords
relating
combined aural
signalling systems
visual signalling
visual
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
AU1537/40A
Other versions
AU153740A (en
Inventor
Ernest Telfer 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.)
Amalgamated Wireless Australasia Ltd
Original Assignee
Amalgamated Wireless Australasia Ltd
Filing date
Publication date
Application filed by Amalgamated Wireless Australasia Ltd filed Critical Amalgamated Wireless Australasia Ltd
Application granted granted Critical
Publication of AU112952B2 publication Critical patent/AU112952B2/en
Publication of AU153740A publication Critical patent/AU153740A/en
Expired legal-status Critical Current

Links

AU1537/40A 1940-04-18 Improvements in or relating to combined aural and visual signalling systems Expired AU112952B2 (en)

Publications (2)

Publication Number Publication Date
AU112952B2 true AU112952B2 (en) 1941-05-01
AU153740A AU153740A (en) 1941-05-01

Family

ID=

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