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 Edward Tyrer DouglasfiledCriticalEdward Tyrer Douglas
Priority to ZA9010369ApriorityCriticalpatent/ZA9010369B/en
Publication of ZA9010369BpublicationCriticalpatent/ZA9010369B/en