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 Albertus Greyling JohanfiledCriticalAlbertus Greyling Johan
Priority to ZA878419ApriorityCriticalpatent/ZA878419B/en
Publication of ZA878419BpublicationCriticalpatent/ZA878419B/en