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 Willem Colman BotbylfiledCriticalWillem Colman Botbyl
Priority to ZA200002856ApriorityCriticalpatent/ZA200002856B/en
Publication of ZA200002856BpublicationCriticalpatent/ZA200002856B/en