AU214701B2 - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
AU214701B2
AU214701B2 AU26580/57A AU2658057A AU214701B2 AU 214701 B2 AU214701 B2 AU 214701B2 AU 26580/57 A AU26580/57 A AU 26580/57A AU 2658057 A AU2658057 A AU 2658057A AU 214701 B2 AU214701 B2 AU 214701B2
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
AU26580/57A
Other versions
AU2658057A (en
Inventor
Leslie Galvin John
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of AU2658057A publication Critical patent/AU2658057A/en
Publication of AU214701B2 publication Critical patent/AU214701B2/en
Expired legal-status Critical Current

Links

AU26580/57A 1957-03-28 Improvements in telephone systems Expired AU214701B2 (en)

Publications (2)

Publication Number Publication Date
AU2658057A AU2658057A (en) 1957-10-03
AU214701B2 true AU214701B2 (en) 1957-10-03

Family

ID=

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