US PATENT SUBCLASS 216 / 26
.~ Lens

Current as of: June, 1999
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216 /   HD   ETCHING A SUBSTRATE: PROCESSES

24  DF  FORMING OR TREATING OPTICAL ARTICLE {2}
26.~ Lens

DEFINITION

Classification: 216/26

Lens:

(under subclass 24) Process wherein the optical article contains transparent material which converges or diverges light by refraction.