US PATENT SUBCLASS 229 / 5.82
.~.~ Metal foil

Current as of: June, 1999
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229 /   HD   ENVELOPES, WRAPPERS, AND PAPERBOARD BOXES

100  DF  PAPERBOARD BOX {54}
5.81  DD  .~ Box material includes a coating or a nonpaperboard lamination or is permeated with a substance {3}
5.82.~.~ Metal foil