US PATENT SUBCLASS 420 / 560
.~ Copper containing

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

557  DF  TIN BASE {3}
560.~ Copper containing {1}
561  DF  .~.~> Antimony, or bismuth containing

DEFINITION

Classification: 420/560

Copper containing:

(under subclass 557) Alloy, or metallic composition which additionally contains copper.