US PATENT SUBCLASS 352 / 163
.~ By rotation of film drive sprocket

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

160  DF  WITH FRAMING AND/OR TRAVEL GHOST ELIMINATION {4}
163.~ By rotation of film drive sprocket {1}
164  DF  .~.~> With shutter synchronization

DEFINITION

Classification: 352/163

(under subclass 160) Subject matter including structure to advance or retard the rotation of the film driving sprocket.