US PATENT SUBCLASS 236 / 91 R
.~ Hot and cold

Current as of: June, 1999
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236 /   HD   AUTOMATIC TEMPERATURE AND HUMIDITY REGULATION

*  DD  THERMOSTATIC {9}
91 R.~ Hot and cold {7}
91 A  DF  .~.~> Nonhabitable enclosure, e.g., incubator
91 B  DF  .~.~> With oil burner
91 C  DF  .~.~> With diverse sensor, e.g., humidity, pressure
91 D  DF  .~.~> Heating and cooling
91 E  DF  .~.~> Plural room or plural outside thermostat
91 F  DF  .~.~> With at least one temperature sensor for temperature modifying media
91 G  DF  .~.~> Current modifying sensor

Unofficial Alpha Subclasses: R A B C D E F G

DEFINITION

Classification: 236/91

(under the class definition) Devices operated by a plurality of thermostats, one or more in a location at low temperature

(as the outside of a building) and the others at a relatively high temperature, (as the inside of a building).

SEE OR SEARCH THIS CLASS, SUBCLASS:

9, 14, 37, and 47, for systems which are controlled by temperature at plural places.

44, for opposed thermostats.

SEE OR SEARCH CLASS

165, Heat Exchange, 257, for a selective heating or cooling arrangement controlled by room and ambient temperature sensors.