US PATENT SUBCLASS 356 / 239.8
.~.~.~ Detection of an object or particle on surface

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

237.1  DF  INSPECTION OF FLAWS OR IMPURITIES {6}
239.1  DF  .~ Transparent or translucent material {4}
239.7  DF  .~.~ Surface condition {1}
239.8.~.~.~ Detection of an object or particle on surface

DEFINITION

Classification: 356/239.8

Detection of an object or particle on surface:

(under subclass 239.7) Inspection of surface condition wherein the specimen being detected is a contaminant residing on the veneer of the article.

SEE OR SEARCH THIS CLASS, SUBCLASS:

238.3, for the detection of foreign matter on or within a textile product.

239.5, for the detection of an object on or in a transparent or translucent container.

SEE OR SEARCH CLASS

250, Radiant Energy,

559.41, for a photocell with associated circuitry capable of identifying the presence of a foreign substance on or embedded in a material from variations in a detected light signal.