US PATENT SUBCLASS 165 / 257
.~.~.~.~ Room and ambient temperature sensors

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}
257.~.~.~.~ Room and ambient temperature sensors

DEFINITION

Classification: 165/257

Room and ambient temperature sensors:

(under subclass 254) Subject matter including a temperature sensor in said area and further including an outdoor temperature sensor.

SEE OR SEARCH CLASS

236, Automatic Temperature and Humidity Regulation,

91, for automatic thermostatic control of heating and

cooling; subclass 91 for automatic thermostat control of hot and cold for plural rooms or plural outside thermostats.