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Application filed by Josef Kovar, Novotny Karel, Petr Ing PavlatafiledCriticalJosef Kovar
Priority to CS875609ApriorityCriticalpatent/CS263330B1/en
Publication of CS560987A1publicationCriticalpatent/CS560987A1/en
Publication of CS263330B1publicationCriticalpatent/CS263330B1/en