US PATENT SUBCLASS 396 / FOR 904
.~.~.~.~ Symmetrical opening (354/264)

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 901  DF  .~.~.~ Plural oscillating blades (354/261) {4}
FOR 904.~.~.~.~ Symmetrical opening (354/264)

DEFINITION

Classification: 396/FOR.904

Symmetrical opening: (354/264)

Subject matter under subclass FOR 901 wherein the blades move in diverse directions from or toward a center and form an aperture which always varies the same from the center.