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AU217337B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU217337B2
AU217337B2 AU26978/57A AU2697857A AU217337B2 AU 217337 B2 AU217337 B2 AU 217337B2 AU 26978/57 A AU26978/57 A AU 26978/57A AU 2697857 A AU2697857 A AU 2697857A AU 217337 B2 AU217337 B2 AU 217337B2
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
AU26978/57A
Other versions
AU2697857A (en
Inventor
Gordon Pearce and Derek Hurst James
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 AU217337B2 publication Critical patent/AU217337B2/en
Publication of AU2697857A publication Critical patent/AU2697857A/en
Expired legal-status Critical Current

Links

AU26978/57A 1957-04-11 Improvements in telephone systems Expired AU217337B2 (en)

Publications (2)

Publication Number Publication Date
AU217337B2 true AU217337B2 (en) 1957-10-17
AU2697857A AU2697857A (en) 1957-10-17

Family

ID=

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