AU215721B2 - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
AU215721B2
AU215721B2 AU18258/56A AU1825856A AU215721B2 AU 215721 B2 AU215721 B2 AU 215721B2 AU 18258/56 A AU18258/56 A AU 18258/56A AU 1825856 A AU1825856 A AU 1825856A AU 215721 B2 AU215721 B2 AU 215721B2
Authority
AU
Australia
Prior art keywords
relating
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
AU18258/56A
Other versions
AU1825856A (en
Inventor
Thomas Baker and John Lawley Smith George
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.)
British Telecommunications Research Ltd
Original Assignee
British Telecommunications Research Ltd
Filing date
Publication date
Application filed by British Telecommunications Research Ltd filed Critical British Telecommunications Research Ltd
Application granted granted Critical
Publication of AU1825856A publication Critical patent/AU1825856A/en
Publication of AU215721B2 publication Critical patent/AU215721B2/en
Expired legal-status Critical Current

Links

AU18258/56A 1956-05-15 Improvements in or relating to telephone systems Expired AU215721B2 (en)

Publications (2)

Publication Number Publication Date
AU1825856A AU1825856A (en) 1956-11-15
AU215721B2 true AU215721B2 (en) 1956-11-15

Family

ID=

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