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 Gerd Schmiedel, Volker Lischewski, Joachim Epperlein, Guenther WaltherfiledCriticalGerd Schmiedel
Priority to DD19740577ApriorityCriticalpatent/DD133605A1/en
Publication of DD133605A1publicationCriticalpatent/DD133605A1/en