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Application filed by Leo Spurny, Karel Skocdopole, Ladislav Ing StefanfiledCriticalLeo Spurny
Priority to CS844898ApriorityCriticalpatent/CS240646B1/en
Publication of CS489884A1publicationCriticalpatent/CS489884A1/en
Publication of CS240646B1publicationCriticalpatent/CS240646B1/en