US PATENT SUBCLASS 313 / 557
.~ Incandescent lamp type

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

553  DF  WITH GETTER {8}
557.~ Incandescent lamp type

DEFINITION

Classification: 313/557

Incandescent lamp type:

(under subclass 553) Subject matter wherein there is an incandescent filament within the envelope.