Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Family has litigation Priority to US182,801 priority Critical Priority to US07/182,801 priority patent/US4999143A/en Priority to US26980188A priority Priority to US269,801 priority Application filed by 3D Systems, Inc. Priority date (The priority date is an assumption and is not a legal conclusion. Inventor Charles William Hull Charles William Lewis Original Assignee 3D Systems, Inc. Google Patents WO1989010254A1 - Stereolithographic supports WO1989010254A1 - Stereolithographic supports
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