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 HartoghfiledCriticalM Hartogh
Priority to ZA712844ApriorityCriticalpatent/ZA712844B/en
Publication of ZA712844BpublicationCriticalpatent/ZA712844B/en