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Application filed by Josef Liska, Marie Liskova, Cestmir Srubar, Ruzena SrubarovafiledCriticalJosef Liska
Priority to CS874067ApriorityCriticalpatent/CS262212B1/cs
Publication of CS406787A1publicationCriticalpatent/CS406787A1/cs
Publication of CS262212B1publicationCriticalpatent/CS262212B1/cs