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 F MullerfiledCriticalF Muller
Priority to ZA714067ApriorityCriticalpatent/ZA714067B/en
Publication of ZA714067BpublicationCriticalpatent/ZA714067B/en