US PATENT SUBCLASS 313 / 554
.~ Plural

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

553  DF  WITH GETTER {8}
554.~ Plural {1}
555  DF  .~.~> Diverse

DEFINITION

Classification: 313/554

Plural:

(under subclass 553) Subject matter wherein there are at least two getter materials or structures within the envelope of the lamp or discharge device.