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 M Wehmeyer, A EnslinfiledCriticalM Wehmeyer
Priority to ZA714070ApriorityCriticalpatent/ZA714070B/en
Publication of ZA714070BpublicationCriticalpatent/ZA714070B/en