US PATENT SUBCLASS 349 / FOR 131
.~ Birefringers effect (359/93)

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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

193  DF  LIQUID CRYSTAL OPTICAL ELEMENT {21}
FOR 131.~ Birefringers effect (359/93)

DEFINITION

Classification: 349/FOR.131

Birefringence effect:

Foreign Art Collection wherein either the liquid crystal cell or an element used with the liquid crystal cell exhibits the refraction of light in two slightly different directions to form two rays.