US PATENT SUBCLASS 359 / 777
.~.~.~.~.~.~ Infinite radius

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

642  DF  LENS {32}
754  DF  .~ Multiple component lenses {6}
771  DF  .~.~ Four components {2}
772  DF  .~.~.~ First component positive {5}
775  DF  .~.~.~.~ + - - + Arrangement {1}
776  DF  .~.~.~.~.~ With multiple element component {2}
777.~.~.~.~.~.~ Infinite radius

DEFINITION

Classification: 359/777

Infinite radius:

(under subclass 776) Subject matter wherein at least one mass of refractive material has at least one flat surface perpendicular to an optical axis.