US PATENT SUBCLASS 148 / 424
.~ Manganese base

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

400  DF  STOCK {20}
424.~ Manganese base

DEFINITION

Classification: 148/424

Manganese base:

(under subclass 400) Stock material which contains over 50 percent of manganese by weight.