US PATENT SUBCLASS 420 / 550
.~ Iron, cobalt, or nickel containing

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

528  DF  ALUMINUM BASE {7}
550.~ Iron, cobalt, or nickel containing {1}
551  DF  .~.~> Titanium, zirconium, hafnium, vanadium, noobium or tantalum containing

DEFINITION

Classification: 420/550

Iron, cobalt or nickel containing:

(under subclass 528) Alloy, or metallic composition which additionally contains at least one of the metals iron,

cobalt, or nickel.