US PATENT SUBCLASS 420 / 551
.~.~ Titanium, zirconium, hafnium, vanadium, noobium or tantalum containing

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

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

DEFINITION

Classification: 420/551

Titanium, zirconium, hafnium, vanadium, niobim, or tantalum containing:

(under subclass 550) Alloy, or metallic composition which additionally contains at least one of the metals titanium, zirconium, hafnium, vanadium, niobium, or tantalum.