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 R Thomas, D GroblerfiledCriticalR Thomas
Priority to ZA00756239ApriorityCriticalpatent/ZA756239B/en
Publication of ZA756239BpublicationCriticalpatent/ZA756239B/en