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Priority claimed from US10/117,907external-prioritypatent/US6848147B2/en
Application filed by Royal Appliance Mfg. Co.filedCriticalRoyal Appliance Mfg. Co.
Publication of HK1059552A1publicationCriticalpatent/HK1059552A1/zh
Publication of HK1059552BpublicationCriticalpatent/HK1059552B/zh