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Application filed by Josef Ing Bojanovsky, Jan Ing SpringerfiledCriticalJosef Ing Bojanovsky
Priority to CS859461ApriorityCriticalpatent/CS251447B1/en
Publication of CS946185A1publicationCriticalpatent/CS946185A1/en
Publication of CS251447B1publicationCriticalpatent/CS251447B1/en