US PATENT SUBCLASS 73 / 204.16
.~.~.~ By control of a separate heating or cooling element

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

861  DF  VOLUME OR RATE OF FLOW {23}
204.11  DF  .~ Thermal type {9}
204.15  DF  .~.~ Including detail of feedback or rebalancing circuitry {1}
204.16.~.~.~ By control of a separate heating or cooling element

DEFINITION

Classification: 73/204.16

By control of a separate heating or cooling element:

(under subclass 204.15) Subject matter in which a portion of the measuring circuit output is used to control a temperature modifying element distinct from a thermal sensor.

SEE OR SEARCH CLASS

219, Electrical Heating,

327+, for a temperature responsive electrical heater.