Three-dimensional (3D) printers (3D printers); Three-dimensional (3D) bioprinters (3D bioprinters) for fabrication of living tissue models; Computerized machines for the generation of three-dimensional shaped parts; Machines for manufacturing three dimensional models, namely, computer-aided modeling devices; computer-aided additive machines for manufacturing three-dimensional objects; machines for manufacturing three dimensional models, namely, computer-aided modeling devices and associated computer hardware and software sold as a unit; computer-aided additive machines for manufacturing three-dimensional objects and associated computer hardware and software sold as a unit; Machines for manufacturing three dimensional (3D) living tissues; machines, namely, three dimensional (3D) bioprinter for the printing of living tissues; cartridges for containing printing material for use with three dimensional printers; cartridges for containing bioprinting material for use with three dimensional printers; printing cartridges for containing biomaterial for use with three dimensional printers; printing cartridges for containing bioink for use with three dimensional printers