US PATENT SUBCLASS 297 / 452.3
.~.~ For lower back; i.e., lumbar region

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

452.1  DF  BOTTOM OR BACK {12}
452.29  DF  .~ Contoured back {3}
452.3.~.~ For lower back; i.e., lumbar region {2}
452.31  DF  .~.~.~> Rigid or semirigid preshaped panel
452.32  DF  .~.~.~> Preshaped cushioning material

DEFINITION

Classification: 297/452.3

For lower back; i.e., lumbar region:

(under subclass 452.29) Device wherein the back of the seating device is curved to provide specific support for a lower portion of a back of a seated occupant.

SEE OR SEARCH THIS CLASS, SUBCLASS:

284.4+, for an adjustable lumbar support.