US PATENT SUBCLASS 396 / 392
.~.~ Having film-sensing member

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

387  DF  WITH FILM DRIVE {7}
389  DF  .~ Double exposure prevention {5}
392.~.~ Having film-sensing member

DEFINITION

Classification: 396/392

Having film-sensing member:

(under subclass 389) Subject matter including means for engaging a film to detect a state of film advancement and, responsive to the detection, either permitting or prohibiting exposure.