US PATENT SUBCLASS 420 / 509
.~.~ Platinum containing

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

507  DF  GOLD BASE {4}
508  DF  .~ Palladium containing {1}
509.~.~ Platinum containing

DEFINITION

Classification: 420/509

Platinum containing:

(under subclass 508) Alloy, or metallic composition which additionally contains platinum.