US PATENT SUBCLASS 442 / 257
.~.~.~ At least one layer contains wood or cork

Current as of: June, 1999
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442 /   HD   FABRIC (WOVEN, KNITTED, OR NONWOVEN TEXTILE OR CLOTH, ETC.)

181  DF  WOVEN FABRIC (I.E., WOVEN STRAND OR STRIP MATERIAL) {13}
239  DF  .~ Woven fabric including an additional woven fabric layer {4}
255  DF  .~.~ Three or more distinct layers {9}
257.~.~.~ At least one layer contains wood or cork

DEFINITION

Classification: 442/257

At least one layer contains wood or cork:

(under subclass 255) Subject matter wherein at least one layer comprises a material derived from the structural element of a tree or shrub or the bark of a tree.