Apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity, namely, electrical conductors, electrical switches, electrical transformers, electric accumulators and apparatus and instruments for conveying, distributing, transforming, storing, regulating or controlling electric current; electric sensors; detectors, namely, gas detectors for detecting the presence of gas; semiconductor chips; data processors and computers; computer software for use with electric sensors
Electrical and Scientific ApparatusVentilation systems for building comprised of ventilating fans, ventilating exhaust fans and ventilating louvers
Environmental Control Apparatus