(under subclass 207) Apparatus in which a device that changes electrical energy to heat energy is a heat source for the feed line.
SEE OR SEARCH CLASS
48, Gas: Heating and Illuminating,
103, for apparatus generating gas from oil which is heated by an electrical heater and which does not feed an immediately associated fuel discharger specialized to combustion.
137, Fluid Handling,
341, for a fluid handling system of general utility in which the fluid is heated by an electric heating element. 392, Electric Resistance Heating Devices,
386+, for electrical apparatus of general application for vaporizing a liquid and subclasses 441+ for heating a fluid.
