Densimeters; Gas meters; Gasoline gauges; Gasometers; Pressure gauges; Tachometers; Water meters; Air quality measurement apparatus, namely, particle counters; Automatic pill counters; Electronic measuring device that displays a manual wheelchair user's propulsion activity, namely, number of pushes, distance traveled, speed, and cadence; Electronic instruments for use in remote inspection and measurement of industrial components using remote visual devices; Electronic test and measurement dev...