Priority date (The priority date 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 date listed.)
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Application filed by De Beers Ind DiamondfiledCriticalDe Beers Ind Diamond
Priority to ZA90400ApriorityCriticalpatent/ZA90400B/en
Publication of ZA90400BpublicationCriticalpatent/ZA90400B/en
Priority to ZA9010089Aprioritypatent/ZA9010089B/en