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 Mueller NormanfiledCriticalMueller Norman
Priority to ZA909932ApriorityCriticalpatent/ZA909932B/en
Publication of ZA909932BpublicationCriticalpatent/ZA909932B/en