US PATENT SUBCLASS 420 / 472
.~.~ Phosphorus 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}
472.~.~ Phosphorus containing

DEFINITION

Classification: 420/472

Phosphorus containing:

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