US PATENT SUBCLASS 297 / 452.37
.~.~ Having varying density foam

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}
452.37.~.~ Having varying density foam

DEFINITION

Classification: 297/452.37

Having varying density foam:

(under subclass 452.29) Device in which the contoured back comprises two layers or areas made of different types of foam material; i.e., foams having different degrees of hardness.

SEE OR SEARCH THIS CLASS, SUBCLASS:

452.29, for a contoured bottom including foam of different densities.