US PATENT SUBCLASS 313 / 449
.~.~.~.~.~ With additional electrode


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}
447  DF  .~.~.~ With control grid adjacent cathode {1}
448  DF  .~.~.~.~ With anode {1}
449.~.~.~.~.~ With additional electrode {2}
450  DF  .~.~.~.~.~.~> With coating or spiral electrode
451  DF  .~.~.~.~.~.~> With support


DEFINITION

Classification: 313/449

(under subclass 448) Subject matter including an additional electrode.