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 Louis Botha RibbinkfiledCriticalLouis Botha Ribbink
Priority to ZA849691ApriorityCriticalpatent/ZA849691B/en
Publication of ZA849691BpublicationCriticalpatent/ZA849691B/en