AU478221A - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
AU478221A
AU478221A AU4782/21A AU478221A AU478221A AU 478221 A AU478221 A AU 478221A AU 4782/21 A AU4782/21 A AU 4782/21A AU 478221 A AU478221 A AU 478221A AU 478221 A AU478221 A AU 478221A
Authority
AU
Australia
Prior art keywords
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
AU4782/21A
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 Compa Vy
Original Assignee
Automatic Electric Compa Vy
Filing date
Publication date
Application filed by Automatic Electric Compa Vy filed Critical Automatic Electric Compa Vy
Publication of AU478221A publication Critical patent/AU478221A/en
Expired legal-status Critical Current

Links

AU4782/21A 1921-12-07 Improvements in or relating to telephone systems Expired AU478221A (en)

Publications (1)

Publication Number Publication Date
AU478221A true AU478221A (en) 1922-05-09

Family

ID=

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