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Application filed by Bohumil Novotny, Palik FrantisekfiledCriticalBohumil Novotny
Priority to CS842395ApriorityCriticalpatent/CS241777B1/en
Publication of CS239584A1publicationCriticalpatent/CS239584A1/en
Publication of CS241777B1publicationCriticalpatent/CS241777B1/en