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Application filed by Karel Mudr Stein, Frantisek Ing OpltfiledCriticalKarel Mudr Stein
Priority to CS873440ApriorityCriticalpatent/CS269868B1/cs
Publication of CS344087A1publicationCriticalpatent/CS344087A1/cs
Publication of CS269868B1publicationCriticalpatent/CS269868B1/cs