US PATENT SUBCLASS 40 / 545
.~ Gas filled tube

Current as of: June, 1999
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40 /   HD   CARD, PICTURE, OR SIGN EXHIBITING

541  DF  ILLUMINATED SIGN {13}
545.~ Gas filled tube

DEFINITION

Classification: 40/545

Gas filled tube:

(under subclass 541) Sign wherein the illumination means comprises one or more closed tubes filled with a rarefied gas such as neon.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

513+, for electric lamps formed in the shape of indicia or having indicia formed in or on the envelope thereof.