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Application filed by Horst Gruenert, Guenther Kobelt, Peter Szargan, Wolfgang DietrichfiledCriticalHorst Gruenert
Priority to DD18971875ApriorityCriticalpatent/DD122368B1/de
Publication of DD122368A1publicationCriticalpatent/DD122368A1/de
Priority to DD20428278Aprioritypatent/DD135114B2/de
Publication of DD122368B1publicationCriticalpatent/DD122368B1/de