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 H HahnfiledCriticalH Hahn
Priority to ZA707332ApriorityCriticalpatent/ZA707332B/en
Publication of ZA707332BpublicationCriticalpatent/ZA707332B/en