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Priority claimed from GB46667/77Aexternal-prioritypatent/GB1603820A/en
Application filed by Hoover LtdfiledCriticalHoover Ltd
Publication of IT7851701A0publicationCriticalpatent/IT7851701A0/it
Application grantedgrantedCritical
Publication of IT1107991BpublicationCriticalpatent/IT1107991B/it