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 Alan Paul Blakley BrownfiledCriticalAlan Paul Blakley Brown
Priority to ZA87172ApriorityCriticalpatent/ZA87172B/en
Publication of ZA87172BpublicationCriticalpatent/ZA87172B/en