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 Johannes Venter BeckerfiledCriticalJohannes Venter Becker
Priority to ZA861050ApriorityCriticalpatent/ZA861050B/en
Publication of ZA861050BpublicationCriticalpatent/ZA861050B/en