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 Wolfgang Heinelt, Fritz FeigefiledCriticalWolfgang Heinelt
Priority to DD20415678ApriorityCriticalpatent/DD134945A1/en
Publication of DD134945A1publicationCriticalpatent/DD134945A1/en