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.)
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George James Derrick
Original Assignee
George James Derrick
Publication date
Application grantedgrantedCritical
Publication of AU146437B2publicationCriticalpatent/AU146437B2/en
Publication of AU3474350ApublicationCriticalpatent/AU3474350A/en