US PATENT SUBCLASS 451 / 449
.~ Cooling

Current as of: June, 1999
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451 /   HD   ABRADING

442  DF  ACCESSORY {10}
449.~ Cooling {1}
450  DF  .~.~> Wetting grindstone

DEFINITION

Classification: 451/449

Cooling:

(under subclass 442) Accessory for preventing excessive heating of the work or tool during the abrading operation.