US PATENT SUBCLASS 428 / 180
.~.~.~ Waffle-form

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

98  DF  STRUCTURALLY DEFINED WEB OR SHEET (E.G., OVERALL DIMENSION, ETC.) {20}
174  DF  .~ Nonplanar uniform thickness material {5}
179  DF  .~.~ Aligned or parallel nonplanarities {3}
180.~.~.~ Waffle-form

DEFINITION

Classification: 428/180

(under subclass 179) Product wherein the Nonplanarity is in the form of a regular geometrical pattern of polygonal

protuberances and/or depressions, each having a centrally located flat land portion.