AU240400B2 - Improvements in or relating to telephone systems - Google Patents

Improvements in or relating to telephone systems

Info

Publication number
AU240400B2
AU240400B2 AU54742/59A AU5474259A AU240400B2 AU 240400 B2 AU240400 B2 AU 240400B2 AU 54742/59 A AU54742/59 A AU 54742/59A AU 5474259 A AU5474259 A AU 5474259A AU 240400 B2 AU240400 B2 AU 240400B2
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
AU54742/59A
Other versions
AU5474259A (en
Inventor
Edmund Mann and John Montgomery Robins Victor
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.)
British Telecommunications Research Ltd
Original Assignee
British Telecommunications Research Ltd
Filing date
Publication date
Application filed by British Telecommunications Research Ltd filed Critical British Telecommunications Research Ltd
Application granted granted Critical
Publication of AU240400B2 publication Critical patent/AU240400B2/en
Publication of AU5474259A publication Critical patent/AU5474259A/en
Expired legal-status Critical Current

Links

AU54742/59A 1959-11-17 Improvements in or relating to telephone systems Expired AU240400B2 (en)

Publications (2)

Publication Number Publication Date
AU240400B2 true AU240400B2 (en) 1960-05-19
AU5474259A AU5474259A (en) 1960-05-19

Family

ID=

Similar Documents

Publication Publication Date Title
AU240400B2 (en) Improvements in or relating to telephone systems
AU5474259A (en) Improvements in or relating to telephone systems
AU233037B2 (en) Improvements in or relating to carrier telephone systems
AU249227B2 (en) Improvements in or relating to automatic telephone systems
AU257536B2 (en) Improvements in or relating to fluid-operating systems
AU231260B2 (en) Improvements in telephone systems
AU235231B2 (en) Improvements in telephone systems
AU4546759A (en) Improvements in or relating to carrier telephone systems
AU6030760A (en) Improvements in or relating to automatic telephone systems
AU232466B2 (en) Improvements in or relating to telecommunication systems comprising transfluxors
AU249594B2 (en) Improvements in or relating to party lines
AU6643560A (en) Improvements in or relating to fluid-operating systems
AU257824B2 (en) Improvements in or relating to automatic telecommunication systems
AU220239B2 (en) Improvements in or relating to telephone systems
AU241013B2 (en) Improvements in or relating to power-transmission systems
AU4583159A (en) Improvements in telephone systems
AU4713259A (en) Improvements in telephone systems
AU238198B2 (en) Improvements in or relating to call metering in telephone systems
AU245884B2 (en) Improvements in or relating to signalling systems
AU236272B2 (en) Improvements in or relating to signalling systems
AU255185B2 (en) Improvements in or relating to signalling systems
AU242104B2 (en) Improvements in or relating to transmission systems
AU240993B2 (en) Improvements in or relating to loudspeakers
AU236895B2 (en) Improvements in or relating to aerial systems
AU215571B2 (en) Improvements in or relating to telephone or like systems