AU429331A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU429331A
AU429331A AU4293/31A AU429331A AU429331A AU 429331 A AU429331 A AU 429331A AU 4293/31 A AU4293/31 A AU 4293/31A AU 429331 A AU429331 A AU 429331A AU 429331 A AU429331 A AU 429331A
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
AU4293/31A
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 Manufacturing Co Ltd
Original Assignee
Automatic Telephone Manufacturing Co Ltd
Filing date
Publication date
Application filed by Automatic Telephone Manufacturing Co Ltd filed Critical Automatic Telephone Manufacturing Co Ltd
Publication of AU429331A publication Critical patent/AU429331A/en
Expired legal-status Critical Current

Links

AU4293/31A 1931-10-01 Improvements in telephone systems Expired AU429331A (en)

Publications (1)

Publication Number Publication Date
AU429331A true AU429331A (en) 1932-11-03

Family

ID=

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