US PATENT SUBCLASS 313 / 424
.~.~ Ion trap

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

364  DF  CATHODE RAY TUBE {11}
421  DF  .~ Beam deflecting means {7}
424.~.~ Ion trap

DEFINITION

Classification: 313/424

(under subclass 421) Subject matter wherein ions are deflected out of the electron beam to prevent undesirable effects.