US PATENT SUBCLASS 313 / 441
.~ Ray generating or control

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

364  DF  CATHODE RAY TUBE {11}
441.~ Ray generating or control {6}
442  DF  .~.~> With magnetic focus {1}
444  DF  .~.~> Sandwiched electrodes
445  DF  .~.~> Canted electrode (i.e., ion trap)
446  DF  .~.~> Including cathode assembly {2}
456  DF  .~.~> With support for electrode {1}
458  DF  .~.~> Electrode {2}

DEFINITION

Classification: 313/441

(under subclass 364) Subject matter including a cathode source of electrons, electrodes or magnetic elements for controlling electron velocity or beam cross section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

409, for similar subject matter where more than one beam is generated or controlled.

421, for similar subject matter including means for deflecting the beam.