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AU209194B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU209194B2
AU209194B2 AU21688/56A AU2168856A AU209194B2 AU 209194 B2 AU209194 B2 AU 209194B2 AU 21688/56 A AU21688/56 A AU 21688/56A AU 2168856 A AU2168856 A AU 2168856A AU 209194 B2 AU209194 B2 AU 209194B2
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
AU21688/56A
Other versions
AU2168856A (en
Inventor
Austin Read and George Thomas Baker Douglas
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 & Electric Co Ltd And British Telecommunications Research Limited
Original Assignee
Automatic Telephone & Electric Co Ltd And British Telecommunications Research Limited
Filing date
Publication date
Application filed by Automatic Telephone & Electric Co Ltd And British Telecommunications Research Limited filed Critical Automatic Telephone & Electric Co Ltd And British Telecommunications Research Limited
Application granted granted Critical
Publication of AU209194B2 publication Critical patent/AU209194B2/en
Publication of AU2168856A publication Critical patent/AU2168856A/en
Expired legal-status Critical Current

Links

AU21688/56A 1956-09-18 Improvements in telephone systems Expired AU209194B2 (en)

Publications (2)

Publication Number Publication Date
AU209194B2 true AU209194B2 (en) 1957-03-21
AU2168856A AU2168856A (en) 1957-03-21

Family

ID=

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