US PATENT SUBCLASS 396 / FOR 897
.~.~.~.~ Including pneumatic means (354/257)

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  DF  .~.~.~ Having retard means (354/256) {4}
FOR 897.~.~.~.~ Including pneumatic means (354/257)

DEFINITION

Classification: 396/FOR.897

Including pneumatic means: (354/257)

Subject matter under subclass FOR 896 wherein the means to hold the shutter open is an expansible chamber motor.