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Application filed by Ivan Nikoloff, Gerhard Ernst, York Pitschel, Manfred SchiewerfiledCriticalIvan Nikoloff
Priority to DD19979577ApriorityCriticalpatent/DD131987B1/de
Publication of DD131987A1publicationCriticalpatent/DD131987A1/de
Publication of DD131987B1publicationCriticalpatent/DD131987B1/de