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Publication date
Application filed by Jan Majzner, Karel Pirnik, Lubos HesfiledCriticalJan Majzner
Priority to CS86606ApriorityCriticalpatent/CS257713B1/en
Publication of CS60686A1publicationCriticalpatent/CS60686A1/en
Publication of CS257713B1publicationCriticalpatent/CS257713B1/en