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 Cyril John WilliamsfiledCriticalCyril John Williams
Priority to ZA845859ApriorityCriticalpatent/ZA845859B/en
Publication of ZA845859BpublicationCriticalpatent/ZA845859B/en