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
AU15348/33A
Inventor
George Osman Brooks Frederick
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.)
RAILWAY SIGNAL Co Ltd
Original Assignee
RAILWAY SIGNAL Co Ltd
Filing date
Publication date
Application filed by RAILWAY SIGNAL Co LtdfiledCriticalRAILWAY SIGNAL Co Ltd
Publication of AU1534833ApublicationCriticalpatent/AU1534833A/en