US PATENT SUBCLASS 313 / 491
.~.~.~ Electrode structure or material


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

483  DF  WITH LUMINESCENT SOLID OR LIQUID MATERIAL {4}
484  DF  .~ With gaseous discharge medium {1}
485  DF  .~.~ Phosphor on envelope wall {6}
491.~.~.~ Electrode structure or material {1}
492  DF  .~.~.~.~> With shield or additional electrode


DEFINITION

Classification: 313/491

(under subclass 485) Subject matter including one or more electrodes having a particular structure or chemical composition.