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Application filed by Wolfgang Freund, Gerd Seifert, Gert KoehlerfiledCriticalWolfgang Freund
Priority to DD19041175ApriorityCriticalpatent/DD123653B1/de
Publication of DD123653A1publicationCriticalpatent/DD123653A1/xx
Publication of DD123653B1publicationCriticalpatent/DD123653B1/de