AU215332B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU215332B2
AU215332B2 AU21290/56A AU2129056A AU215332B2 AU 215332 B2 AU215332 B2 AU 215332B2 AU 21290/56 A AU21290/56 A AU 21290/56A AU 2129056 A AU2129056 A AU 2129056A AU 215332 B2 AU215332 B2 AU 215332B2
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
AU21290/56A
Other versions
AU2129056A (en
Inventor
James Frederick Denby and Alan Heathcote James Gordon Pearce
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 AU215332B2 publication Critical patent/AU215332B2/en
Publication of AU2129056A publication Critical patent/AU2129056A/en
Expired legal-status Critical Current

Links

AU21290/56A 1956-09-03 Improvements in telephone systems Expired AU215332B2 (en)

Publications (2)

Publication Number Publication Date
AU215332B2 true AU215332B2 (en) 1957-03-07
AU2129056A AU2129056A (en) 1957-03-07

Family

ID=

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