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Application filed by Josef Phmr Kovar, Frantisek Ing SkublafiledCriticalJosef Phmr Kovar
Priority to CS871945ApriorityCriticalpatent/CS265534B1/en
Publication of CS194587A1publicationCriticalpatent/CS194587A1/en
Publication of CS265534B1publicationCriticalpatent/CS265534B1/en