US PATENT SUBCLASS 420 / 474
.~.~ Lead containing

Current as of: June, 1999
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420 /   HD   ALLOYS OR METALLIC COMPOSITIONS

469  DF  COPPER BASE {15}
470  DF  .~ Tin containing {5}
474.~.~ Lead containing {1}
475  DF  .~.~.~> Zinc containing

DEFINITION

Classification: 420/474

Lead containing:

(under subclass 470) Alloy, or metallic composition which additionally contains lead.