US PATENT SUBCLASS 148 / 306
.~.~ Iron base (i.e., ferrous)
Current as of:
June, 1999
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148 /
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METAL TREATMENT
400
DF
STOCK
{20}
300
DF
.~ Magnetic {7}
306
.~.~ Iron base (i.e., ferrous) {3}
307
DF
.~.~.~
> Silicon containing {2}
310
DF
.~.~.~
> Nickel containing
311
DF
.~.~.~
> Cobalt containing
DEFINITION
Classification: 148/306
Iron base (i.e., ferrous):
(under subclass 306) Stock material which contains over 50 percent iron.