US PATENT SUBCLASS 313 / 452
.~.~.~ With focus electrode adjacent cathode


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.~.~.~ With focus electrode adjacent cathode {2}
453  DF  .~.~.~.~> Noncircular beam type
454  DF  .~.~.~.~> Nonplanar cathode {1}


DEFINITION

Classification: 313/452

(under subclass 446) Subject matter including a focus electrode immediate the cathode.