AU202974B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU202974B2
AU202974B2 AU7686/55A AU768655A AU202974B2 AU 202974 B2 AU202974 B2 AU 202974B2 AU 7686/55 A AU7686/55 A AU 7686/55A AU 768655 A AU768655 A AU 768655A AU 202974 B2 AU202974 B2 AU 202974B2
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
AU7686/55A
Other versions
AU768655A (en
Inventor
Frederick Denby and Douglas Austin Read 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 AU768655A publication Critical patent/AU768655A/en
Publication of AU202974B2 publication Critical patent/AU202974B2/en
Expired legal-status Critical Current

Links

AU7686/55A 1955-03-18 Improvements in telephone systems Expired AU202974B2 (en)

Publications (2)

Publication Number Publication Date
AU768655A AU768655A (en) 1955-09-22
AU202974B2 true AU202974B2 (en) 1955-09-22

Family

ID=

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