US PATENT SUBCLASS 40 / 448
.~.~ Liquid crystal


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

446  DF  CHANGING EXHIBITOR {25}
447  DF  .~ Alphanumeric (monogram) device {4}
448.~.~ Liquid crystal


DEFINITION

Classification: 40/448

Liquid crystal:

(under subclass 447) Exhibitor wherein the elements of the matrix are liquid crystal devices, the activation of which causes its color to change from that of its surrounding environment, thus presenting the number or letter desired.

SEE OR SEARCH CLASS

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

50+, and 87+ for similar display systems with specific selective electrical control means.

349, Liquid Crystal Cells, Elements and Systems, appropriate subclasses for processes and apparatus for making a liquid crystal device.