AU172921A - Improvements in or relating to automatic telephone systems - Google Patents

Improvements in or relating to automatic telephone systems

Info

Publication number
AU172921A
AU172921A AU1729/21A AU172921A AU172921A AU 172921 A AU172921 A AU 172921A AU 1729/21 A AU1729/21 A AU 1729/21A AU 172921 A AU172921 A AU 172921A AU 172921 A AU172921 A AU 172921A
Authority
AU
Australia
Prior art keywords
relating
telephone systems
automatic telephone
automatic
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
AU1729/21A
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 Electric Co
Original Assignee
Automatic Electric Co
Filing date
Publication date
Application filed by Automatic Electric Co filed Critical Automatic Electric Co
Publication of AU172921A publication Critical patent/AU172921A/en
Expired legal-status Critical Current

Links

AU1729/21A 1921-05-13 Improvements in or relating to automatic telephone systems Expired AU172921A (en)

Publications (1)

Publication Number Publication Date
AU172921A true AU172921A (en) 1922-04-26

Family

ID=

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