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.)
Filing date
Publication date
Application filed by Boart Int LtdfiledCriticalBoart Int Ltd
Priority to ZA821402ApriorityCriticalpatent/ZA821402B/en
Publication of ZA821402BpublicationCriticalpatent/ZA821402B/en