Artificial limbs for medical instruction purposes; Distance measuring apparatus; Educational apparatus, namely, blocks used as teaching aids for modeling chemical compounds, visualization of math concepts; Educational apparatus, namely, manipulative blocks used as teaching aids for the visualization of math concepts; Electrical inductors; Electronic apparatus for testing compression, strength, hardness and tensile characteristics of industrial materials; Electronic apparatus for testing the curing and drying of elastomeric materials; Electronic equipment for inspection and detection of foreign material within containers; Electronic sports training simulators; Laser speed detectors; Lasers for measuring; Lasers for measuring purposes; Lasers for non-medical purposes; Metal hardness testing machines; Optical apparatus and instruments, namely, optical ports for underwater photography, dome ports for underwater photography, wet diopters, adapter lenses for underwater photography; Optical apparatus, namely, a non-lethal security device that uses a light source to detect, warn, repel, temporarily blind, disorient, nauseate, disable, confuse, debilitate, stun, subdue, stop, or incapacitate persons or animals; Optical character recognition apparatus; Optical inspection apparatus; Probes for scientific purposes; Speed indicators; Speed limiters for limiting vehicle engine speed, namely, aftermarket, add-on devices for vehicles in order to limit the maximum speed output of an automobile; Surveying instruments; Teaching robots; Telemeters; Surface roughness testing machines and instruments; Virtual reality software for medical teaching