US PATENT SUBCLASS 442 / 241
.~.~.~ Four or more layers

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}
240  DF  .~.~ Mechanically needled or hydroentangled {2}
241.~.~.~ Four or more layers

DEFINITION

Classification: 442/241

Four or more layers:

(under subclass 240) Subject matter wherein four or more layers have been subjected to a needling or hydroentanglement operation.