US PATENT SUBCLASS 396 / FOR 896
.~.~.~ Having retard means (354/256)

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

FOR 842  DF  CAMERA DETAILS (354/202) {10}
FOR 866  DF  .~ Shutter (354/226) {10}
FOR 890  DF  .~.~ Pivoting or rotating blade (354/250) {6}
FOR 896.~.~.~ Having retard means (354/256) {4}
FOR 897  DF  .~.~.~.~> Including pneumatic means (354/257)
FOR 898  DF  .~.~.~.~> Including electric circuit means (354/258.1)
FOR 899  DF  .~.~.~.~> Including gear means (354/259)
FOR 900  DF  .~.~.~.~> Including cam means (354/260)

DEFINITION

Classification: 396/FOR.896

Having retard means: (354/256)

Subject matter under subclass FOR 890 having means to hold a shutter fully open for a certain period of time.