US PATENT SUBCLASS 422 / 85
.~.~.~ Based on color change

Current as of: June, 1999
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422 /   HD   CHEMICAL APPARATUS AND PROCESS DISINFECTING, DEODORIZING, PRESERVING, OR STERILIZING

50  DF  ANALYZER, STRUCTURED INDICATOR, OR MANIPULATIVE LABORATORY DEVICE {11}
83  DF  .~ Means for analyzing gas sample {6}
84  DF  .~.~ Breath tester {1}
85.~.~.~ Based on color change

DEFINITION

Classification: 422/85

Based on color change:

(under subclass 84) Apparatus wherein the analytical measurement is based on a color change.