US PATENT SUBCLASS 252 / 586
.~ Displaying color change

Current as of: June, 1999
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252 /   HD   COMPOSITIONS

582  DF  LIGHT TRANSMISSION MODIFYING COMPOSITIONS {6}
586.~ Displaying color change

DEFINITION

Classification: 252/586

Displaying color change:

(under subclass 582) Composition which modify the transmission property by changing color.