US PATENT SUBCLASS 349 / FOR 136
.~.~ Pleochroic dye (359/98)

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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

193  DF  LIQUID CRYSTAL OPTICAL ELEMENT {21}
FOR 134  DF  .~ Variable absorption of light due to an additive in the liquid crystal material (359/96) {2}
FOR 136.~.~ Pleochroic dye (359/98)

DEFINITION

Classification: 349/FOR.136

Pleochroic dye:

Foreign Art Collection wherein a pleochroic dye is added to the liquid crystal for controlling the absorption of light.