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AU217136B2 - Improvements in signalling systems - Google Patents

Improvements in signalling systems

Info

Publication number
AU217136B2
AU217136B2 AU30419/57A AU3041957A AU217136B2 AU 217136 B2 AU217136 B2 AU 217136B2 AU 30419/57 A AU30419/57 A AU 30419/57A AU 3041957 A AU3041957 A AU 3041957A AU 217136 B2 AU217136 B2 AU 217136B2
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
AU30419/57A
Other versions
AU3041957A (en
Inventor
Francis Campbell Charles
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 AU3041957A publication Critical patent/AU3041957A/en
Publication of AU217136B2 publication Critical patent/AU217136B2/en
Expired legal-status Critical Current

Links

AU30419/57A 1957-08-15 Improvements in signalling systems Expired AU217136B2 (en)

Publications (2)

Publication Number Publication Date
AU3041957A AU3041957A (en) 1958-02-20
AU217136B2 true AU217136B2 (en) 1958-02-20

Family

ID=

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