AU400221A - Improveinents in or relating to telephone systems - Google Patents

Improveinents in or relating to telephone systems

Info

Publication number
AU400221A
AU400221A AU4002/21A AU400221A AU400221A AU 400221 A AU400221 A AU 400221A AU 4002/21 A AU4002/21 A AU 4002/21A AU 400221 A AU400221 A AU 400221A AU 400221 A AU400221 A AU 400221A
Authority
AU
Australia
Prior art keywords
improveinents
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
AU4002/21A
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 Company A Dual
Original Assignee
Automatic Electric Company A Dual
Filing date
Publication date
Application filed by Automatic Electric Company A Dual filed Critical Automatic Electric Company A Dual
Publication of AU400221A publication Critical patent/AU400221A/en
Expired legal-status Critical Current

Links

AU4002/21A 1921-10-14 Improveinents in or relating to telephone systems Expired AU400221A (en)

Publications (1)

Publication Number Publication Date
AU400221A true AU400221A (en) 1922-04-04

Family

ID=

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