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
AU24671/30A
Inventor
Ewart Williams William
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.)
COLUMBIA GRAPHOPHONE COMPANY Ltd
Original Assignee
COLUMBIA GRAPHOPHONE COMPANY Ltd
Filing date
Publication date
Application filed by COLUMBIA GRAPHOPHONE COMPANY LtdfiledCriticalCOLUMBIA GRAPHOPHONE COMPANY Ltd
Publication of AU2467130ApublicationCriticalpatent/AU2467130A/en