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Application filed by Hermann Gruenzel, Juergen Jentzsch, Alfred Jumar, Paul Held, Wilfried SchulzefiledCriticalHermann Gruenzel
Priority to DD19366976ApriorityCriticalpatent/DD128381B1/de
Publication of DD128381A1publicationCriticalpatent/DD128381A1/de
Publication of DD128381B1publicationCriticalpatent/DD128381B1/de