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Application filed by Bernd Hoffmann, Manfred Kramer, Dieter MuerbefiledCriticalBernd Hoffmann
Priority to DD20636878ApriorityCriticalpatent/DD137459B1/de
Publication of DD137459A1publicationCriticalpatent/DD137459A1/de
Publication of DD137459B1publicationCriticalpatent/DD137459B1/de