US PATENT SUBCLASS 165 / FOR 101
.~ Heating and cooling (165/2)

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

FOR 100  DF  PROCESS (165/1) {1}
FOR 101.~ Heating and cooling (165/2) {1}
FOR 102  DF  .~.~> Humidity adjusting (165/3)

DEFINITION

Classification: 165/FOR.101

Foreign art collections for (1) heating at one time and cooling at another, (2) for both adding heat to and removing it from the same material and (3) for separately heating and cooling distinct external materials.