US PATENT SUBCLASS 250 / 384
.~.~.~ Radioactive

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

336.1  DF  INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING {16}
374  DF  .~ Including a radiant energy responsive gas discharge device {8}
382  DF  .~.~ With means to ionize the gas {2}
384.~.~.~ Radioactive

DEFINITION

Classification: 250/384

(under subclass 382) Subject matter wherein the means to ionize the gas is a material that emits spontaneously, invisible nuclear particulate or electromagnetic energy.