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Priority claimed from US07/182,830external-prioritypatent/US5059359A/en
Priority claimed from US07/331,644external-prioritypatent/US5184307A/en
Application filed by 3D Systems, IncfiledCritical3D Systems, Inc
Publication of HK1003081A1publicationCriticalpatent/HK1003081A1/zh
Publication of HK1003081BpublicationCriticalpatent/HK1003081B/zh