US PATENT SUBCLASS 396 / 514
.~.~.~ Film or spool locking means

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

439  DF  CAMERA DETAIL {15}
511  DF  .~ Detachable or removable film holder unit {2}
512  DF  .~.~ Film cassette or cartridge {4}
514.~.~.~ Film or spool locking means

DEFINITION

Classification: 396/514

Film or spool locking means:

(under subclass 512) Subject matter having means for preventing rotation of the film or spool except when the light-tight enclosure is in an operative position in the camera.