Economisers, namely, apparatus that recovers wasted heat from heating boiler or furnace exhaust gas and transfers it to heating boiler feed water or other process water

Apparatus for creating, recording, transmission, processing, retrieval, manipulation and reproduction of sound; dynamic audio signal processors; audio effects processors and signal processors; sound equalizers, namely, graphic equalizers and sound equalizers; audio controllers, namely, electronic controllers for use in audio applications

Heat recovery equipment, namely, apparatus that recovers wasted energy from boiler or furnace exhaust gas and transfers it to boiler or other process water