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Application filed by Karel Ing Stanka, Pavel Ing Dvorsky, Karel Ing Csc JanufiledCriticalKarel Ing Stanka
Priority to CS84506ApriorityCriticalpatent/CS239714B1/en
Publication of CS50684A1publicationCriticalpatent/CS50684A1/en
Publication of CS239714B1publicationCriticalpatent/CS239714B1/en