Number | Name | Date | Kind |
---|---|---|---|
5011635 | Murphy et al. | Apr 1991 | |
5031120 | Pomerantz et al. | Jul 1991 | |
5049901 | Gelbart | Sep 1991 | |
5059359 | Hull et al. | Oct 1991 | |
5123734 | Spence et al. | Jun 1992 | |
5164128 | Modrek et al. | Nov 1992 |
Entry |
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3D Systems, Inc. brochure. |