AU215819B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU215819B2
AU215819B2 AU26979/57A AU2697957A AU215819B2 AU 215819 B2 AU215819 B2 AU 215819B2 AU 26979/57 A AU26979/57 A AU 26979/57A AU 2697957 A AU2697957 A AU 2697957A AU 215819 B2 AU215819 B2 AU 215819B2
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
AU26979/57A
Other versions
AU2697957A (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 AU2697957A publication Critical patent/AU2697957A/en
Publication of AU215819B2 publication Critical patent/AU215819B2/en
Expired legal-status Critical Current

Links

AU26979/57A 1957-04-11 Improvements in telephone systems Expired AU215819B2 (en)

Publications (2)

Publication Number Publication Date
AU2697957A AU2697957A (en) 1957-10-07
AU215819B2 true AU215819B2 (en) 1957-10-07

Family

ID=

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