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Application filed by Bernd Hoffmann, Manfred Kramer, Dieter MuerbefiledCriticalBernd Hoffmann
Priority to DD20538478ApriorityCriticalpatent/DD136869B1/de
Publication of DD136869A1publicationCriticalpatent/DD136869A1/de
Publication of DD136869B1publicationCriticalpatent/DD136869B1/de