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Application filed by Dimcho D Draganov, Venceslav D Draganov, Nenko D Nenkov, Pet R N BalabanskifiledCriticalDimcho D Draganov
Priority to BG8256988ApriorityCriticalpatent/BG45168A1/xx
Publication of BG45168A1publicationCriticalpatent/BG45168A1/xx