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Application filed by Jan Ing Kucera, Jaroslav Ing BernasekfiledCriticalJan Ing Kucera
Priority to CS867169ApriorityCriticalpatent/CS260888B1/en
Publication of CS716986A1publicationCriticalpatent/CS716986A1/en
Publication of CS260888B1publicationCriticalpatent/CS260888B1/en