US PATENT SUBCLASS 345 / 75
.~.~.~ Vacuum fluorescent

Current as of: June, 1999
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345 /   HD   COMPUTER GRAPHICS PROCESSING, OPERATOR INTERFACE PROCESSING, AND SELECTIVE VISUAL DISPLAY SYSTEMS

30  DF  PLURAL PHYSICAL DISPLAY ELEMENT CONTROL SYSTEM (E.G., NON-CRT) {4}
55  DF  .~ Display elements arranged in matrix (e.g., rows and columns) {10}
74  DF  .~.~ Cathodoluminescent type {1}
75.~.~.~ Vacuum fluorescent

DEFINITION

Classification: 345/75

Vacuum fluorescent:

(under subclass 74) Subject matter wherein the cathodoluminescent display elements* include a vacuum for electrons to travel through so as to excite a phosphor material to emit light.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47, for segmented fluorescent element display.