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Application filed by Vaclav Kaspar, Ladislav Kaspar, Jaroslav PoslednifiledCriticalVaclav Kaspar
Priority to CS848692ApriorityCriticalpatent/CS242599B1/en
Publication of CS869284A1publicationCriticalpatent/CS869284A1/en
Publication of CS242599B1publicationCriticalpatent/CS242599B1/en