US PATENT SUBCLASS 352 / 215
.~.~.~ Counter rotatable

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

204  DF  SHUTTERS {3}
208  DF  .~ Rotary {7}
214  DF  .~.~ With axially spaced independently driven blades {2}
215.~.~.~ Counter rotatable

DEFINITION

Classification: 352/215

(under subclass 214) Subject matter in which the light

interrupting blades move in opposite directions.