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 Peter Van HeusdenfiledCriticalPeter Van Heusden
Priority to ZA826558ApriorityCriticalpatent/ZA826558B/en
Publication of ZA826558BpublicationCriticalpatent/ZA826558B/en