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Application filed by Leopold Skrivanek, Frantisek KolouchfiledCriticalLeopold Skrivanek
Priority to CS883706ApriorityCriticalpatent/CS269270B1/cs
Publication of CS370688A1publicationCriticalpatent/CS370688A1/cs
Publication of CS269270B1publicationCriticalpatent/CS269270B1/cs