US PATENT SUBCLASS 359 / 655
.~.~.~ In a variable media (e.g., gas, elastomer, etc.)

Current as of: June, 1999
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359 /   HD   OPTICS: SYSTEMS (INCLUDING COMMUNICATION) AND ELEMENTS

642  DF  LENS {32}
652  DF  .~ With graded refractive index {2}
654  DF  .~.~ Having a radial gradient {1}
655.~.~.~ In a variable media (e.g., gas, elastomer, etc.)

DEFINITION

Classification: 359/655

In a variable media (e.g., gas, elastomer, etc.):

(under subclass 654) Subject matter wherein the chemical composition of the lens varies in a spatial dimension.