US PATENT SUBCLASS 396 / 409
.~.~ Film feed error detection or end of film detection

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

387  DF  WITH FILM DRIVE {7}
406  DF  .~ Having significant electronic circuit detail {4}
409.~.~ Film feed error detection or end of film detection

DEFINITION

Classification: 396/409

Film feed error detection or end of film detection:

(under subclass 406) Subject matter having electrical or electronic means to sense improper film movement or maximum film extension from its container.