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Priority claimed from US06/638,905external-prioritypatent/US4575330A/en
Application filed by 3D Systems, Inc.filedCritical3D Systems, Inc.
Publication of HK1001701A1publicationCriticalpatent/HK1001701A1/zh
Publication of HK1001701BpublicationCriticalpatent/HK1001701B/zh