US PATENT SUBCLASS 451 / 341
.~ Double treadle

Current as of: June, 1999
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451 /   HD   ABRADING

340  DF  FRAME OR MOUNT {4}
341.~ Double treadle

DEFINITION

Classification: 451/341

Double treadle:

(under subclass 340) Frame or mount organized to permit driving of the grinding tool by alternately acting treadles.