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 B Knight, D KnightfiledCriticalB Knight
Priority to ZA00812147ApriorityCriticalpatent/ZA812147B/en
Publication of ZA812147BpublicationCriticalpatent/ZA812147B/en