40 Manufacture of three-dimensional objects, namely, prototypes, models, patterns, molds, medical devices and finished goods, to the order and specification of others; manufacturing services, namely, stereolithography, direct metal laser sintering, and 3D printing to the order and specification of others; rental of three-dimensional printers; providing three-dimensional printing services for others; providing custom three-dimensional printing services; technical support services, namely, providing technical advice related to three-dimensional printing