US PATENT SUBCLASS 373 / 136
.~.~ Temperature

Current as of: June, 1999
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373 /   HD   INDUSTRIAL ELECTRIC HEATING FURNACES

109  DF  RESISTANCE FURNACE DEVICE {7}
135  DF  .~ Control {1}
136.~.~ Temperature

DEFINITION

Classification: 373/136

Temperature:

(under subclass 135) Subject matter including means to control the temperature of the furnace.

SEE OR SEARCH CLASS

340, Communications: Electrical,

501+, for temperature responsive indicating systems.