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 Richard John Hungerf SchroederfiledCriticalRichard John Hungerf Schroeder
Priority to ZA925970ApriorityCriticalpatent/ZA925970B/en
Publication of ZA925970BpublicationCriticalpatent/ZA925970B/en