US PATENT SUBCLASS 250 / 399
.~.~ Secondary emissive type

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

396 R  DF  WITH CHARGED PARTICLE BEAM DEFLECTION OR FOCUSSING {3}
398  DF  .~ With target means {2}
399.~.~ Secondary emissive type

DEFINITION

Classification: 250/399

(under subclass 398) Subject matter wherein the object irradiated itself gives off invisible radiation as a result of its having been struck by the beam.