US PATENT SUBCLASS 165 / 64
.~.~ Heat generator

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}
64.~.~ Heat generator

DEFINITION

Classification: 165/64

(under subclass 61) Apparatus wherein the heating and cooling means includes a device by which heat is produced by transformation of energy, e.g., electric heater or burner.