US PATENT SUBCLASS 250 / 427
.~ Electron bombardment type

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

423 R  DF  ION GENERATION {6}
427.~ Electron bombardment type

DEFINITION

Classification: 250/427

(under subclass 423) Subject matter wherein the means to remove or add electrons comprises means to project electrons toward the materials to be ionized.