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Application filed by Josef Hudec, Vaclav Ing Hanus, Malek Jiri, Ladislav Prom Geol Brodsky, Jan Prom Fyz Brunclik, Zdenek Ing Stepanek, Petr I HavelfiledCriticalJosef Hudec
Priority to CS852366ApriorityCriticalpatent/CS256859B1/cs
Publication of CS236685A1publicationCriticalpatent/CS236685A1/cs
Publication of CS256859B1publicationCriticalpatent/CS256859B1/cs