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 Pillman A H & Son 1972 PtyfiledCriticalPillman A H & Son 1972 Pty
Priority to ZA892994ApriorityCriticalpatent/ZA892994B/en
Publication of ZA892994BpublicationCriticalpatent/ZA892994B/en