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Application filed by Helfried John, Joergen StenderfiledCriticalHelfried John
Priority to DD20293777ApriorityCriticalpatent/DD134709B1/de
Priority to CS795678Aprioritypatent/CS218869B1/cs
Publication of DD134709A1publicationCriticalpatent/DD134709A1/de
Publication of DD134709B1publicationCriticalpatent/DD134709B1/de