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Application filed by Ivan Ing Blatny, Otakar HumlfiledCriticalIvan Ing Blatny
Priority to CS833428ApriorityCriticalpatent/CS238981B1/en
Publication of CS342883A1publicationCriticalpatent/CS342883A1/en
Publication of CS238981B1publicationCriticalpatent/CS238981B1/en