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 Yeong An JangfiledCriticalYeong An Jang
Priority to ZA923702ApriorityCriticalpatent/ZA923702B/en
Publication of ZA923702BpublicationCriticalpatent/ZA923702B/en