Electronic components in the nature of infrared detectors for use in further manufacture; Electronic detectors for observing and measuring the infrared spectrum, namely, infrared detectors; Fire alarm and emergency evacuation devices, namely, fire alarm control panels, smoke detectors, heat detectors, alarm pull stations, audible and visible notification appliances, strobes, sirens, bells, horns, and speakers; Galena crystal detectors for use in electronics; Heat detection systems comprised o...