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Application filed by Otakar Ing Sedlicky, Petr SkripskyfiledCriticalOtakar Ing Sedlicky
Priority to CS875924ApriorityCriticalpatent/CS265171B1/en
Publication of CS592487A1publicationCriticalpatent/CS592487A1/en
Publication of CS265171B1publicationCriticalpatent/CS265171B1/en