U UNITRAC SYSTEMS

electromechanical controls for use in railway switching, electric signals, and vehicle identification systems consisting of a vehicle-borne transponder and a wayside receiver, for electrified transportation including rail and trolley systems commonly found in transit and mining operations

switch heaters and controls; namely, resistive constant wattage heaters consisting of a metallic sheath, a resistive element positioned inside the sheath and an electrical insulating packing compound