Structures for conveying fluids and also for conducting electrical energy.
(1) Note. See this class, subclass 8 and indented subclasses, for structures in which fluids are employed for or applied to the electrical apparatus.
(2) Note. See Class 405, Hydraulic and Earth Engineering, subclasses 132+ and Class 404, Road Structure, Process, or Apparatus, subclasses 3, 4+ and 17+, for conduits combined with pavement, curb or gutter structure and not limited solely to electrical use.
(3) Note. See Class 138, Pipes and Tubular Conduits, subclasses 129+, 137+ and 140+ for composite pipes having metal, frequently in the form of wire strands. Where the structure incorporates the wire in insulated relation for electrical conductive purposes, it is in this class (174).
(4) Note. See Class 340, Communications: Electrical, subclass 320 for electric systems for signaling along a fire hose or other fluid conduit.
(5) Note. Search Class 313, Electric Lamp and Discharge Devices, subclasses 11+, for electric lamps and space discharge devices which are provided with means for conducting a temperature modifying fluid to the lamp or discharge device, the fluid conducting means being designed for use also as an electrical conductor, and Class 315, Electric Lamp and Discharge Devices: Systems, subclass 50, for electric lamps and discharge devices which have means for conducting a temperature modifying medium to the lamp or discharge device, the fluid conducting means being designed for use as an electrical impedance.
