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AU110606B2 - Improvements in or relating to voice frequency signalling systems - Google Patents
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AU110606B2 - Improvements in or relating to voice frequency signalling systems - Google Patents

Improvements in or relating to voice frequency signalling systems

Info

Publication number
AU110606B2
AU110606B2 AU2239/39A AU223939A AU110606B2 AU 110606 B2 AU110606 B2 AU 110606B2 AU 2239/39 A AU2239/39 A AU 2239/39A AU 223939 A AU223939 A AU 223939A AU 110606 B2 AU110606 B2 AU 110606B2
Authority
AU
Australia
Prior art keywords
relating
voice frequency
signalling systems
frequency 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 - Lifetime
Application number
AU2239/39A
Inventor
Philip Goodwin Wright Esmond
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.)
Nokia Services Ltd
Original Assignee
Standard Telephone and Cables Pty Ltd
Filing date
Publication of AU110606B2 publication Critical patent/AU110606B2/en
Application filed by Standard Telephone and Cables Pty Ltd filed Critical Standard Telephone and Cables Pty Ltd
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

AU2239/39A 1939-05-19 Improvements in or relating to voice frequency signalling systems Expired - Lifetime AU110606B2 (en)

Publications (1)

Publication Number Publication Date
AU110606B2 true AU110606B2 (en)

Family

ID=

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