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 A MullerfiledCriticalA Muller
Priority to ZA711781ApriorityCriticalpatent/ZA711781B/en
Publication of ZA711781BpublicationCriticalpatent/ZA711781B/en