US PATENT SUBCLASS 428 / 83
.~ Channel or U-shaped perimeter

Current as of: June, 1999
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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

81  DF  PERIMETER OR CORNER STRUCTURE OF SHEET (EXCLUDING MERE RECTANGULAR) {3}
83.~ Channel or U-shaped perimeter

DEFINITION

Classification: 428/83

(under subclass 81) Product in which the corner or perimeter structure defines a channel or U-Shape.