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AU217490B2 - Improvements in signalling systems - Google Patents
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AU217490B2 - Improvements in signalling systems - Google Patents

Improvements in signalling systems

Info

Publication number
AU217490B2
AU217490B2 AU28389/57A AU2838957A AU217490B2 AU 217490 B2 AU217490 B2 AU 217490B2 AU 28389/57 A AU28389/57 A AU 28389/57A AU 2838957 A AU2838957 A AU 2838957A AU 217490 B2 AU217490 B2 AU 217490B2
Authority
AU
Australia
Prior art keywords
signalling systems
signalling
systems
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
AU28389/57A
Other versions
AU2838957A (en
Inventor
Eric Bertram Ireland and Leslie James Browell John Henry Keating
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
Publication date
Application granted granted Critical
Publication of AU217490B2 publication Critical patent/AU217490B2/en
Publication of AU2838957A publication Critical patent/AU2838957A/en
Expired legal-status Critical Current

Links

AU28389/57A Improvements in signalling systems Expired AU217490B2 (en)

Publications (2)

Publication Number Publication Date
AU217490B2 true AU217490B2 (en) 1957-12-05
AU2838957A AU2838957A (en) 1957-12-05

Family

ID=

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