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 Guenther ZschernitzfiledCriticalGuenther Zschernitz
Priority to BE591640ApriorityCriticalpatent/BE591640A/en
Publication of BE591640ApublicationCriticalpatent/BE591640A/en