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 Witefi AnstaltfiledCriticalWitefi Anstalt
Priority to ZA726424ApriorityCriticalpatent/ZA726424B/en
Publication of ZA726424BpublicationCriticalpatent/ZA726424B/en