US PATENT SUBCLASS 165 / 63
.~.~ Refrigeration producer

Current as of: June, 1999
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165 /   HD   HEAT EXCHANGE

58  DF  HEATING AND COOLING {3}
61  DF  .~ Heating and cooling of the same material {4}
63.~.~ Refrigeration producer

DEFINITION

Classification: 165/63

(under subclass 61) Apparatus wherein the heating and cooling means includes apparatus to cause a cooling effect by producing a change in the condition of a material, e.g., change of phase of a material.