(under the class definition) Subject matter consisting of domestic heating vessels and/or heat exchangers used for
heating in the manner of a cooking stove or oven which are heated by the waste heat of a combustion engine as contained in its exhaust products or cooling fluid.
SEE OR SEARCH THIS CLASS, SUBCLASS:
271.1+, for surfaced heaters, some of which utilize heat from the exhaust or cooling fluid of engines.
SEE OR SEARCH CLASS
60, Power Plants,
320+, for an internal combustion engine in which an exhaust system element is nominal means for heating. 237, Heating Systems,
12.1+, for heating systems utilizing the waste heat of power plants.
