US PATENT SUBCLASS 359 / 710
.~.~ Cylindrical

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

642  DF  LENS {32}
708  DF  .~ Including a nonspherical surface {10}
710.~.~ Cylindrical

DEFINITION

Classification: 359/710

Cylindrical:

(under subclass 708) Subject matter wherein the nonspherical lens surface has a shape bounded by two parallel planes and a surface generated by a line tracing a closed curve where the line is parallel to an initial position.