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Application filed by Boleslav Ing Cernoch, Karel VilimekfiledCriticalBoleslav Ing Cernoch
Priority to CS845914ApriorityCriticalpatent/CS244475B1/en
Publication of CS591484A1publicationCriticalpatent/CS591484A1/en
Publication of CS244475B1publicationCriticalpatent/CS244475B1/en