The inkjet stylus includes a nozzle for depositing ink onto a writing surface. The ink is drawn from an ink cartridge, which may contain a plurality of ink containers, each holding a different color ink. A switch mechanism is used to select different combinations of ink to produce different colors. A microcontroller controls the switch mechanism so as to select the combination of inks that will produce the desired color, and also controls how the ink is deposited on the writing surface using the nozzle. A battery powers the electronic devices in the inkjet stylus.

An improved multi-fluid jetting device. The jetting device includes a nozzle plate having a substantially planar surface for ejecting a fluid therefrom. The nozzle plate has at least 10 or more nozzles wherein groups of three adjacent nozzles are arranged in a triad orientation and wherein at least two adjacent nozzles in said triad orientation are coupled to two different fluid sources for fluid ejection from said adjacent nozzles substantially perpendicular to said nozzle plate surface.

A measurement and marking device includes a housing, a positional sensing assembly mounted in the housing, a printhead assembly mounted in the housing, and a controller mounted in the housing and communicating with the positional sensing assembly and the printhead assembly. The positional sensing assembly is adapted to sense a position of the housing relative to an object as the housing is moved along a surface of the object and the printhead assembly is adapted to print on the surface of the object as the housing is moved along the surface of the object. As such, the controller is adapted to operate the printhead assembly to print a mark on the surface of the object based on the position of the housing relative to the object as the housing is moved along the surface of the object.