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 Sawaya FrederickfiledCriticalJ Sawaya Frederick
Priority to ZA922912ApriorityCriticalpatent/ZA922912B/en
Publication of ZA922912BpublicationCriticalpatent/ZA922912B/en