US PATENT SUBCLASS 396 / 481
.~.~.~.~ Curtain width opening adjustable

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

439  DF  CAMERA DETAIL {15}
452  DF  .~ Shutter {12}
479  DF  .~.~ Curtain type {1}
480  DF  .~.~.~ Plural curtains {1}
481.~.~.~.~ Curtain width opening adjustable {1}
482  DF  .~.~.~.~.~> Three or more rollers

DEFINITION

Classification: 396/481

Curtain width opening adjustable:

(under subclass 480) Subject matter including means to adjust or control an extent of the opening to produce the exposure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

, FOR 883, for a foreign art collection involving a curtain shutter having variable curtain width opening.