US PATENT SUBCLASS 313 / 453
.~.~.~.~ Noncircular 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}
453.~.~.~.~ Noncircular beam type

DEFINITION

Classification: 313/453

(under subclass 452) Subject matter wherein the focus electrode and cathode produce a beam that is noncircular in cross-section.