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Application filed by Straka Frantisek, Oldrich Ing KaufmannfiledCriticalStraka Frantisek
Priority to CS879569ApriorityCriticalpatent/CS263899B1/en
Publication of CS956987A1publicationCriticalpatent/CS956987A1/en
Publication of CS263899B1publicationCriticalpatent/CS263899B1/en