US PATENT SUBCLASS 356 / 239.2
.~.~ Optical element (e.g., contact lens, prism, filter, lens, etc.)

Current as of: June, 1999
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356 /   HD   OPTICS: MEASURING AND TESTING

237.1  DF  INSPECTION OF FLAWS OR IMPURITIES {6}
239.1  DF  .~ Transparent or translucent material {4}
239.2.~.~ Optical element (e.g., contact lens, prism, filter, lens, etc.)

DEFINITION

Classification: 356/239.2

Optical element (e.g., contact lens, prism, filter, lens, etc.):

(under subclass 239.1) Inspection of transparent or

translucent material specifically designed to manipulate or alter light to achieve a particular result.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements, appropriate subclass for an optical element or system per se.