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Application filed by Josef Pospisil, Stulc Vaclav, Fotul Ilja, Becvar JaroslavfiledCriticalJosef Pospisil
Priority to CS864586ApriorityCriticalpatent/CS256511B1/en
Publication of CS458686A1publicationCriticalpatent/CS458686A1/en
Publication of CS256511B1publicationCriticalpatent/CS256511B1/en