US PATENT SUBCLASS 420 / 582
.~.~ Copper containing

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

580  DF  CONTAINING OVER 50 PER CENT METAL BUT NO BASE METAL {4}
581  DF  .~ Iron containing {2}
582.~.~ Copper containing

DEFINITION

Classification: 420/582

Copper containing:

(under subclass 581) Alloy, or metallic composition which additionally contains copper.