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Priority claimed from DD18971875Aexternal-prioritypatent/DD122368B1/de
Application filed by Horst Gruenert, Guenther Kobelt, Peter Szargan, Wolfgang DietrichfiledCriticalHorst Gruenert
Priority to DD20428278ApriorityCriticalpatent/DD135114B2/de
Publication of DD135114A2publicationCriticalpatent/DD135114A2/de
Publication of DD135114B2publicationCriticalpatent/DD135114B2/de