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Application filed by Michal Ing Kellner, Lichvar Milan, Zedenyi Mikulas, Kovac Jozef, Radislav Lipka, Gustav EsiarcikfiledCriticalMichal Ing Kellner
Priority to CS866971ApriorityCriticalpatent/CS257363B1/cs
Publication of CS697186A1publicationCriticalpatent/CS697186A1/cs
Publication of CS257363B1publicationCriticalpatent/CS257363B1/cs