US PATENT SUBCLASS 396 / 501
.~.~.~.~ Opposite movement

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

439  DF  CAMERA DETAIL {15}
452  DF  .~ Shutter {12}
493  DF  .~.~ Pivoting or rotating blade type {3}
497  DF  .~.~.~ Plural oscillating blades {4}
501.~.~.~.~ Opposite movement

DEFINITION

Classification: 396/501

Opposite movement:

(under subclass 497) Subject matter wherein one blade moves in one direction while another blade moves in another direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

, FOR 905, for a foreign art collection involving a shutter having plural oscillating blades of opposite movement.