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Application filed by Vilem Ing Stribrny, Jan Ing BenovskyfiledCriticalVilem Ing Stribrny
Priority to CS832306ApriorityCriticalpatent/CS231280B1/en
Publication of CS230683A1publicationCriticalpatent/CS230683A1/en
Publication of CS231280B1publicationCriticalpatent/CS231280B1/en