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Publication date
Application filed by Pirko Jan, Novotny OtakarfiledCriticalPirko Jan
Priority to CS86474ApriorityCriticalpatent/CS254581B1/en
Priority to SU867774391Aprioritypatent/SU1592418A1/en
Publication of CS47486A1publicationCriticalpatent/CS47486A1/en
Publication of CS254581B1publicationCriticalpatent/CS254581B1/en