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Application filed by Frantisek Kucera, Leos Ing StylarekfiledCriticalFrantisek Kucera
Priority to CS882779ApriorityCriticalpatent/CS269181B1/en
Publication of CS277988A1publicationCriticalpatent/CS277988A1/en
Publication of CS269181B1publicationCriticalpatent/CS269181B1/en