US PATENT SUBCLASS 420 / 113
.~.~.~ Tungsten containing

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

8  DF  FERROUS (I.E., IRON BASE) {24}
104  DF  .~ Chromium containing, but less than 9 percent {4}
112  DF  .~.~ Nickel containing {1}
113.~.~.~ Tungsten containing

DEFINITION

Classification: 420/113

Tungsten containing:

(under subclass 112) Alloy or metallic composition which additionally contains tungsten.