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Application filed by Vaclav Votapek, Jan Chlumecky, Josef Ing Solc, Prachar OtakarfiledCriticalVaclav Votapek
Priority to CS847419ApriorityCriticalpatent/CS242280B1/en
Publication of CS741984A1publicationCriticalpatent/CS741984A1/en
Publication of CS242280B1publicationCriticalpatent/CS242280B1/en