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Application filedfiledCritical
Priority to DD15347871ApriorityCriticalpatent/DD99390A2/xx
Priority to DE19712160518prioritypatent/DE2160518A1/de
Priority to BG1924471Aprioritypatent/BG18702A1/xx
Priority to FR7147422Aprioritypatent/FR2122872A5/fr
Publication of DD99390A2publicationCriticalpatent/DD99390A2/xx