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Application filed by Nachev, AngelovfiledCriticalNachev
Priority to BG8047116ApriorityCriticalpatent/BG32323A1/en
Priority to NO811001Aprioritypatent/NO158207C/en
Priority to EP81102261Aprioritypatent/EP0037521B1/en
Priority to DE8181102261Tprioritypatent/DE3171369D1/en
Publication of BG32323A1publicationCriticalpatent/BG32323A1/en