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Application filed by Tkac Ivan, Vrchovecky Josef, Dzierza Emil, Bakoncik VladislawfiledCriticalTkac Ivan
Priority to CS884494ApriorityCriticalpatent/CS266771B1/en
Publication of CS449488A1publicationCriticalpatent/CS449488A1/en
Publication of CS266771B1publicationCriticalpatent/CS266771B1/en