US PATENT SUBCLASS 165 / 258
.~.~.~.~ Separate heating and cooling thermostats

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

200  DF  WITH TIMER, PROGRAMMER, TIME DELAY, OR CONDITION RESPONSIVE CONTROL {14}
201  DF  .~ Having heating and cooling capability {13}
253  DF  .~.~ Temperature sensor controlling temperature {4}
254  DF  .~.~.~ System selects heating or cooling mode automatically (e.g., responsive to season, ambient light, temperature in conditioned area, etc.) {5}
258.~.~.~.~ Separate heating and cooling thermostats

DEFINITION

Classification: 165/258

Separate heating and cooling thermostats:

(under subclass 254) Subject matter including a first device which measures changes in temperature and controls a heating means; and a second device which measures changes in temperature and controls a cooling means to maintain desired temperature.

SEE OR SEARCH CLASS

236, Automatic Temperature and Humidity Regulation,

1, for heating and cooling control devices.