US PATENT SUBCLASS 349 / 170
.~ Utilizing reversal in sign of dielectric anisotropy

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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

167  DF  WITH SPECIFIED NONCHEMICAL CHARACTERISTIC OF LIQUID CRYSTAL MATERIAL {6}
170.~ Utilizing reversal in sign of dielectric anisotropy

DEFINITION

Classification: 349/170

Utilizing reversal in sign of dielectricanisotropy:

(under subclass 167) Subject matter wherein the polarity of the dielectric anisotropy changes from positive to negative or vice versa.