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 Allen NormanfiledCriticalAllen Norman
Priority to ZA873760ApriorityCriticalpatent/ZA873760B/en
Publication of ZA873760BpublicationCriticalpatent/ZA873760B/en