US PATENT SUBCLASS 236 / 22
.~ Radiator type

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

20 R  DF  CLOSED FLUID HEATERS {8}
22.~ Radiator type

DEFINITION

Classification: 236/22

(under subclass 20) Combined radiators and heaters where the heater is controlled according to the temperature of the radiator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

26+, for heaters controlled by the pressure in the radiator.

32, 33, for heaters controlled by a thermostat.

SEE OR SEARCH CLASS

237, Heating Systems,

7, for systems where the unit is specifically claimed.