US PATENT SUBCLASS 313 / 455
.~.~.~.~.~ Brillouin beam type

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

364  DF  CATHODE RAY TUBE {11}
441  DF  .~ Ray generating or control {6}
446  DF  .~.~ Including cathode assembly {2}
452  DF  .~.~.~ With focus electrode adjacent cathode {2}
454  DF  .~.~.~.~ Nonplanar cathode {1}
455.~.~.~.~.~ Brillouin beam type

DEFINITION

Classification: 313/455

(under subclass 454) Subject matter wherein the cathode and associated electrodes produce a hollow beam in which the electron density increases radially from the beam center.