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 Bruijn H DefiledCriticalBruijn H De
Priority to ZA731845ApriorityCriticalpatent/ZA731845B/en
Publication of ZA731845BpublicationCriticalpatent/ZA731845B/en