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 J Van NiekerkfiledCriticalJ Van Niekerk
Priority to ZA705840ApriorityCriticalpatent/ZA705840B/en
Priority to FR7129856Aprioritypatent/FR2104393A5/en
Priority to DE19712141422prioritypatent/DE2141422A1/en
Priority to RO68017Aprioritypatent/RO61574A/ro
Publication of ZA705840BpublicationCriticalpatent/ZA705840B/en