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Application filed by Josef Mikestik, Miloslav Judr Had, Jaroslav SvatekfiledCriticalJosef Mikestik
Priority to CS832441ApriorityCriticalpatent/CS231865B1/en
Publication of CS244183A1publicationCriticalpatent/CS244183A1/en
Publication of CS231865B1publicationCriticalpatent/CS231865B1/en