[ Printers; ] inkjet printers, component parts for printers, namely, printheads[ printer control systems, namely, printer connection cables, computer interface boards for printers, electric changeover switches for printers and computer programs for controlling printers; replacement parts for all of the foregoing; ink supply systems for printers, namely, conductive printing inks and fluids and computer programs for operating ink supply systems for printers; computer software for use in printin...