US PATENT SUBCLASS 165 / 237
.~.~ Means responsive to occupancy of space

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}
237.~.~ Means responsive to occupancy of space

DEFINITION

Classification: 165/237

Means responsive to occupancy of space:

(under subclass 201) Subject matter including means to control the system in response to the presence of a living being in the area.