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Application filed by Ladislav Lengyel, Ivan Ing Cermak, Alexander Kucharek, Peter Salamun, Jozef RybarfiledCriticalLadislav Lengyel
Priority to CS842968ApriorityCriticalpatent/CS239816B1/en
Publication of CS296884A1publicationCriticalpatent/CS296884A1/en
Publication of CS239816B1publicationCriticalpatent/CS239816B1/en