US PATENT SUBCLASS 73 / 29.04
.~.~ With visual indication

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

23.2  DF  GAS ANALYSIS {15}
29.01  DF  .~ Moisture content or vapor pressure {4}
29.04.~.~ With visual indication

DEFINITION

Classification: 73/29.04

With visual indication:

(under subclass 29.01) Subject matter wherein the determination is made by directly observing the visible effect of a gas on a sensor.