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 William Harvey MacmenigallfiledCriticalWilliam Harvey Macmenigall
Priority to ZA861428ApriorityCriticalpatent/ZA861428B/en
Publication of ZA861428BpublicationCriticalpatent/ZA861428B/en