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 Andries Stephanus HerbstfiledCriticalAndries Stephanus Herbst
Priority to ZA200001724ApriorityCriticalpatent/ZA200001724B/en
Publication of ZA200001724BpublicationCriticalpatent/ZA200001724B/en