AU1297347A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU1297347A
AU1297347A AU12973/47A AU1297347A AU1297347A AU 1297347 A AU1297347 A AU 1297347A AU 12973/47 A AU12973/47 A AU 12973/47A AU 1297347 A AU1297347 A AU 1297347A AU 1297347 A AU1297347 A AU 1297347A
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
AU12973/47A
Other versions
AU139731B2 (en
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.)
PUNCH ENGINEERING PTY Ltd
Original Assignee
PUNCH ENGINEERING PTY Ltd
Filing date
Publication date
Application filed by PUNCH ENGINEERING PTY Ltd filed Critical PUNCH ENGINEERING PTY Ltd
Application granted granted Critical
Publication of AU1297347A publication Critical patent/AU1297347A/en
Publication of AU139731B2 publication Critical patent/AU139731B2/en
Expired legal-status Critical Current

Links

AU12973/47A 1947-06-20 Improvements in telephone systems Expired AU139731B2 (en)

Publications (2)

Publication Number Publication Date
AU1297347A true AU1297347A (en) 1948-05-27
AU139731B2 AU139731B2 (en) 1948-05-27

Family

ID=

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