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 William Lee WrightfiledCriticalWilliam Lee Wright
Priority to ZA943883ApriorityCriticalpatent/ZA943883B/en
Publication of ZA943883BpublicationCriticalpatent/ZA943883B/en