US PATENT SUBCLASS 420 / 481
.~.~ Nickel containing

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

469  DF  COPPER BASE {15}
477  DF  .~ Zinc containing {5}
481.~.~ Nickel containing

DEFINITION

Classification: 420/481

Nickel containing:

(under subclass 477) Alloy, or metallic composition which additionally contains nickel.