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 Gideon De Beer JohannesfiledCriticalGideon De Beer Johannes
Priority to ZA882897ApriorityCriticalpatent/ZA882897B/en
Publication of ZA882897BpublicationCriticalpatent/ZA882897B/en