US PATENT SUBCLASS 297 / 452.21
.~ Contoured bottom

Current as of: June, 1999
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297 /   HD   CHAIRS AND SEATS

452.1  DF  BOTTOM OR BACK {12}
452.21.~ Contoured bottom {2}
452.22  DF  .~.~> Planar bottom with a central recess
452.23  DF  .~.~> Laterally extending contour {3}

DEFINITION

Classification: 297/452.21

Contoured bottom:

(under subclass 452.1) Device having a bottom shaped to substantially conform with the shape or curvature of buttocks of a seated occupant.

SEE OR SEARCH THIS CLASS, SUBCLASS:

284.1+, for a bottom having means to change its contour.

452.29+, for a contoured back.