US PATENT SUBCLASS 359 / 712
.~.~ Paraboloidal

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}
712.~.~ Paraboloidal

DEFINITION

Classification: 359/712

Paraboloidal:

(under subclass 708) Subject matter wherein the nonspherical lens surface has a shape formed by revolving about an axis of symmetry a set of points equally distant from a fixed point and a fixed line.