Computer input devices; [ computer mice; ] computer keyboards [ ; electronic card readers; electrical switches, namely, snap switches, push button switches, sliding contact switches, rocker switches, and selector switches; key modules, namely, mechanical input keys for keyboards and keypads; electronic controls, namely, range top controls and cooking oven controls; wireless remote electrical switches; electrical transmission sensors; power electronics, namely, AC-DC converters, transformers, electric converters, current controllers, current converters, and frequency converters; sensors, namely, electric sensors, proximity sensors, sensors for determining position, velocity, acceleration and temperature, magnetic, capacitive, ultrasonic, optical and hall effect position sensors; electric switches, magnetically activated, mechanical, hall effect, capacitive, and optical vane switches, liquid level sensors, fuel filling level sensors, door contact sensors, floor level sensors for use on elevators, magnetic, hall effect, and optical gear tooth sensors for speed and direction measurement, hall effect, magnetic and optical angular position sensors for motors, engines and transmissions, magnetic, optical, capacitive, ultrasonic and hall effect position sensors for measuring angular position, rotary direction, distance and inclination ]