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
AU22059/70A
Inventor
Geoffrey Hughes David
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.)
Decca Ltd
Original Assignee
Decca Ltd
Filing date
Publication of AU436108B2publicationCriticalpatent/AU436108B2/en
Application filed by Decca LtdfiledCriticalDecca Ltd