US PATENT SUBCLASS 236 / 20 A
.~ Top burner control

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

20 R  DF  CLOSED FLUID HEATERS {8}
20 A.~ Top burner control

Unofficial Alpha Subclasses: R A

DEFINITION

Classification: 236/20

(under the class definition) Devices controlling the temperature of the fluid heated.