US PATENT SUBCLASS 359 / 649
.~.~ Projection type

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

642  DF  LENS {32}
648  DF  .~ With field curvature shaping {1}
649.~.~ Projection type {2}
650  DF  .~.~.~> Having four components
651  DF  .~.~.~> Having less than four components

DEFINITION

Classification: 359/649

Projection type:

(under subclass 648) Subject matter wherein an image of an image plane is caused to be visible at an object plane.