AU111894B2 - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
AU111894B2
AU111894B2 AU4973/39A AU497339A AU111894B2 AU 111894 B2 AU111894 B2 AU 111894B2 AU 4973/39 A AU4973/39 A AU 4973/39A AU 497339 A AU497339 A AU 497339A AU 111894 B2 AU111894 B2 AU 111894B2
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
AU4973/39A
Other versions
AU497339A (en
Inventor
Barker Pier
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.)
Associated Electric Laboratories Inc
Original Assignee
Associated Electric Laboratories Inc
Filing date
Publication date
Application filed by Associated Electric Laboratories Inc filed Critical Associated Electric Laboratories Inc
Application granted granted Critical
Publication of AU497339A publication Critical patent/AU497339A/en
Publication of AU111894B2 publication Critical patent/AU111894B2/en
Expired legal-status Critical Current

Links

AU4973/39A 1939-11-07 Improvements in or relating to telephone systems Expired AU111894B2 (en)

Publications (2)

Publication Number Publication Date
AU497339A AU497339A (en) 1940-11-21
AU111894B2 true AU111894B2 (en) 1940-11-21

Family

ID=

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