US PATENT SUBCLASS 148 / 411
.~.~ Copper base

Current as of: June, 1999
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148 /   HD   METAL TREATMENT

400  DF  STOCK {20}
405  DF  .~ Age or precipitation hardened or strengthened {7}
411.~.~ Copper base {3}
412  DF  .~.~.~> Tin containing
413  DF  .~.~.~> Zinc containing
414  DF  .~.~.~> Nickel containing

DEFINITION

Classification: 148/411

Copper base:

(under subclass 405) Stock material which contains over 50 percent of copper by weight.