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AU210879B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU210879B2
AU210879B2 AU21387/56A AU2138756A AU210879B2 AU 210879 B2 AU210879 B2 AU 210879B2 AU 21387/56 A AU21387/56 A AU 21387/56A AU 2138756 A AU2138756 A AU 2138756A AU 210879 B2 AU210879 B2 AU 210879B2
Authority
AU
Australia
Prior art keywords
telephone systems
telephone
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
AU21387/56A
Other versions
AU2138756A (en
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 AU210879B2 publication Critical patent/AU210879B2/en
Publication of AU2138756A publication Critical patent/AU2138756A/en
Expired legal-status Critical Current

Links

AU21387/56A 1956-09-05 Improvements in telephone systems Expired AU210879B2 (en)

Publications (2)

Publication Number Publication Date
AU210879B2 true AU210879B2 (en) 1957-03-07
AU2138756A AU2138756A (en) 1957-03-07

Family

ID=

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