US PATENT SUBCLASS 428 / *
.~ Special properties


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428 /   HD   STOCK MATERIAL OR MISCELLANEOUS ARTICLES

922  DF  STATIC ELECTRICITY METAL BLEED-OFF METALLIC STOCK* {6}
*.~ Special properties {7}
927  DF  .~.~> Decorative informative
928  DF  .~.~> Magnetic
929  DF  .~.~> Electrical contact feature
930  DF  .~.~> Electric superconducting
931  DF  .~.~> Components of differing electric conductivity
932  DF  .~.~> Abrasive or cutting feature
933  DF  .~.~> Sacrificial component