(under the class definition) Subject matter combined with a source of, or a sink for, thermal energy so associated with a bed as to affect the temperature felt by a person in the bed.
(1) Note. This subclass receives patents claiming bed related structure combined with nonelectric heating means.
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284, for a heating or cooling device incorporated in the bedstead.
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62, Refrigeration, for cooling, generally.
165, Heat Exchange, for heating and cooling.
219, Electric Heating, 217, for a bed or bed related structure combined with electric heating means.
