AU140425B2 - Improvements in electric signalling systems - Google Patents

Improvements in electric signalling systems

Info

Publication number
AU140425B2
AU140425B2 AU15012/47A AU1501247A AU140425B2 AU 140425 B2 AU140425 B2 AU 140425B2 AU 15012/47 A AU15012/47 A AU 15012/47A AU 1501247 A AU1501247 A AU 1501247A AU 140425 B2 AU140425 B2 AU 140425B2
Authority
AU
Australia
Prior art keywords
signalling systems
electric signalling
electric
systems
signalling
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
AU15012/47A
Other versions
AU1501247A (en
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.)
General Electric Co
Original Assignee
General Electric Co
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Application granted granted Critical
Publication of AU140425B2 publication Critical patent/AU140425B2/en
Publication of AU1501247A publication Critical patent/AU1501247A/en
Expired legal-status Critical Current

Links

AU15012/47A 1947-09-10 Improvements in electric signalling systems Expired AU140425B2 (en)

Publications (2)

Publication Number Publication Date
AU140425B2 true AU140425B2 (en) 1947-10-09
AU1501247A AU1501247A (en) 1947-10-09

Family

ID=

Similar Documents

Publication Publication Date Title
AU140425B2 (en) Improvements in electric signalling systems
AU1501247A (en) Improvements in electric signalling systems
AU137810B2 (en) Improvements in or relating to electric signalling systems
AU137437B2 (en) Improvements in or relating to electric signalling systems
AU140008B2 (en) Improvements in or relating to electrical signalling systems
AU143835B2 (en) Improvements in or relating to electrical signalling systems
AU141304B2 (en) Improvements in or relating to electric signaling systems
CA445079A (en) Electrical signalling system
CA441672A (en) Electrical signalling system
AU968747A (en) Improvements in or relating to electric signalling systems
AU968647A (en) Improvements in or relating to electric signalling systems
AU1384747A (en) Improvements in or relating to electrical signalling systems
AU140956B2 (en) Improvements in telephone signalling systems
AU1239847A (en) Improvements in or relating to electric signaling systems
AU143616B2 (en) Improvements in velocity-modulation systems
AU141012B2 (en) Improvements in or relating to electric signalling or control systems
CA444727A (en) Electrical signalling arrangement
AU142013B2 (en) Improvements in or relating to electric selecting systems
AU136070B2 (en) Improvement in path-indicating systems
IE18218L (en) Electric signalling systems
IE18116L (en) Electric signalling systems
AU135411B2 (en) Improvements in signalling systems
CA443440A (en) Signalling system
CA440968A (en) Signalling system
CA439944A (en) Signalling system