US PATENT SUBCLASS 352 / 222
.~ Fluid pressure type

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

221  DF  GATES {9}
222.~ Fluid pressure type

DEFINITION

Classification: 352/222

(under subclass 221) Subject matter wherein the motion picture film is maintained in position against the gate by a liquid or gas.