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Application filed by Valkov, Kozhev, Georgiev, MarinovfiledCriticalValkov
Priority to BG99156ApriorityCriticalpatent/BG62233B1/en
Publication of BG99156ApublicationCriticalpatent/BG99156A/en
Publication of BG62233B1publicationCriticalpatent/BG62233B1/en