US PATENT SUBCLASS 148 / 306
.~.~ Iron base (i.e., ferrous)

Current as of: June, 1999
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148 /   HD   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.