US PATENT SUBCLASS 40 / 770
.~.~ Cooperating closure and aperture

Current as of: June, 1999
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40 /   HD   CARD, PICTURE, OR SIGN EXHIBITING

700  DF  PICTURE FRAME {29}
768  DF  .~ Mat, mount, or backing {8}
770.~.~ Cooperating closure and aperture

DEFINITION

Classification: 40/770

Cooperating closure and aperture:

(under subclass 768) Picture frame including a mat, mount, or backing having an opening therein which allows the mat, mount, or backing to be inserted or removed and a movable cover attached to the frame which allows or prevents access to the opening.