US PATENT SUBCLASS 313 / 642
.~.~.~.~ And rare gas


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

567  DF  WITH GAS OR VAPOR {24}
637  DF  .~ With particular gas or vapor {2}
638  DF  .~.~ With metal vapor {1}
639  DF  .~.~.~ Mercury vapor {2}
642.~.~.~.~ And rare gas


DEFINITION

Classification: 313/642

And rare gas:

(under subclass 639) Subject matter wherein the composition includes a rare gas.