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Application filed by Hans Donath, Beier Hans Peter, Gottfried Otto, Erich Franke, Guenter Kornetzky, Eberhard Dietz, Klaus WenzelfiledCriticalHans Donath
Priority to CS546671ApriorityCriticalpatent/CS175572B1/cs
Publication of CS175572B1publicationCriticalpatent/CS175572B1/cs