AU334331A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number: AU334331A
Authority: AU; Australia
Prior art keywords: telephone systems; telephone; systems
Prior art date: 1931-08-03
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

AU3343/31A

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.)

Associated Telephone and Telegraph Co

Original Assignee

Associated Telephone and Telegraph Co

Filing date

1931-08-03

Publication date

1932-08-11

1931-08-03 Application filed by Associated Telephone and Telegraph Co filed Critical Associated Telephone and Telegraph Co

1932-08-11 Publication of AU334331A publication Critical patent/AU334331A/en

Status Expired legal-status Critical Current

Links

AU3343/31A 1931-08-03 Improvements in telephone systems Expired AU334331A (en)

Publications (1)

Publication Number	Publication Date
AU334331A true AU334331A (en)	1932-08-11

Family

ID=

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