US PATENT SUBCLASS 250 / 367
.~.~ Plural or composite luminophor

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

336.1  DF  INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING {16}
361 R  DF  .~ With or including a luminophor {7}
367.~.~ Plural or composite luminophor

DEFINITION

Classification: 250/367

(under subclass 361) Subject matter including two or more separate passive means that convert incident invisible radiation into visible radiation or including diverse passive means that convert incident invisible radiation into visible radiation.

(1) Note. The diverse passive means may include a crystal of dissimilar materials both of which luminesce but in response to different incident radiations.