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 Stephanus Johannes ZandbergfiledCriticalStephanus Johannes Zandberg
Priority to ZA869776ApriorityCriticalpatent/ZA869776B/en
Publication of ZA869776BpublicationCriticalpatent/ZA869776B/en