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Application filed by Dietmar Reinert, Lothar Bagger, Werner HertelfiledCriticalDietmar Reinert
Priority to DD20772978ApriorityCriticalpatent/DD139321B1/de
Publication of DD139321A1publicationCriticalpatent/DD139321A1/de
Publication of DD139321B1publicationCriticalpatent/DD139321B1/de