US PATENT SUBCLASS 352 / 120
.~.~.~ Plate type

Current as of: June, 1999
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352 /   HD   OPTICS: MOTION PICTURES

105  DF  OPTICAL RECTIFIER TYPE {6}
113  DF  .~ Refractor {3}
119  DF  .~.~ Rotating plano parallel prism {1}
120.~.~.~ Plate type

DEFINITION

Classification: 352/120

(under subclass 119) Subject matter in which the plano-parallel prism has but two faces.