AU141970B2 - Improvements in intercommunication telephone systems - Google Patents

Improvements in intercommunication telephone systems

Info

Publication number
AU141970B2
AU141970B2 AU16683/47A AU1668347A AU141970B2 AU 141970 B2 AU141970 B2 AU 141970B2 AU 16683/47 A AU16683/47 A AU 16683/47A AU 1668347 A AU1668347 A AU 1668347A AU 141970 B2 AU141970 B2 AU 141970B2
Authority
AU
Australia
Prior art keywords
telephone systems
intercommunication telephone
intercommunication
systems
telephone
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
AU16683/47A
Other versions
AU1668347A (en
Filing date
Publication date
Application filed filed Critical
Application granted granted Critical
Publication of AU1668347A publication Critical patent/AU1668347A/en
Publication of AU141970B2 publication Critical patent/AU141970B2/en
Expired legal-status Critical Current

Links

AU16683/47A 1947-11-28 Improvements in intercommunication telephone systems Expired AU141970B2 (en)

Publications (2)

Publication Number Publication Date
AU1668347A AU1668347A (en) 1948-12-02
AU141970B2 true AU141970B2 (en) 1948-12-02

Family

ID=

Similar Documents

Publication Publication Date Title
AU141970B2 (en) Improvements in intercommunication telephone systems
AU1668347A (en) Improvements in intercommunication telephone systems
AU139731B2 (en) Improvements in telephone systems
AU1297347A (en) Improvements in telephone systems
AU140956B2 (en) Improvements in telephone signalling systems
AU139605B2 (en) Improvements in carrier telephone systems
CA443722A (en) Telephone system
CA445443A (en) Telephone system
CA439394A (en) Telephone system
CA440708A (en) Telephone system
CA440944A (en) Telephone system
CA441179A (en) Telephone system
CA441180A (en) Telephone system
CA441181A (en) Telephone system
CA441406A (en) Telephone system
CA441465A (en) Telephone system
CA441947A (en) Telephone system
CA442718A (en) Telephone system
CA442941A (en) Telephone system
CA442988A (en) Telephone system
CA443037A (en) Telephone system
CA443405A (en) Telephone system
CA443407A (en) Telephone system
CA443721A (en) Telephone system
CA445446A (en) Telephone system