US PATENT SUBCLASS 148 / 319
.~.~ Ferrous (i.e., iron base)
Current as of:
June, 1999
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148 /
HD
METAL TREATMENT
400
DF
STOCK
{20}
316
DF
.~ Carburized or nitrided {2}
319
.~.~ Ferrous (i.e., iron base)
DEFINITION
Classification: 148/319
Ferrous (i.e., iron base):
(under subclass 316) Stock material which contains over 50
percent iron.
