US PATENT SUBCLASS 250 / 486.1
.~.~ With plural luminescent material or plural luminescent containing layers or areas

Current as of: June, 1999
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250 /   HD   RADIANT ENERGY

472.1  DF  INVISIBLE RADIATION RESPONSIVE NONELECTRIC SIGNALLING {4}
483.1  DF  .~ Luminescent device {4}
486.1.~.~ With plural luminescent material or plural luminescent containing layers or areas

DEFINITION

Classification: 250/486.1

With plural luminescent material or plural luminescent containing layers or areas:

(under subclass 483.1) Subject matter wherein the structure includes plural luminescent materials, several luminescent layers or distinct areas or volumes of the same structure which contains the same or different luminescent materials.