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Application filed by Frantisek Ing Kosvica, Libor Ing KellerfiledCriticalFrantisek Ing Kosvica
Priority to CS86589ApriorityCriticalpatent/CS261371B1/en
Publication of CS58986A1publicationCriticalpatent/CS58986A1/en
Publication of CS261371B1publicationCriticalpatent/CS261371B1/en