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Application filed by Vojtech Tolnai, Dusan Kupca, Ladislav HribikfiledCriticalVojtech Tolnai
Priority to CS838567ApriorityCriticalpatent/CS239576B1/en
Publication of CS856783A1publicationCriticalpatent/CS856783A1/en
Publication of CS239576B1publicationCriticalpatent/CS239576B1/en