US PATENT SUBCLASS 37 / 256
.~.~.~ Including centrifugal impeller

Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
244  DF  .~ Motorized rotary excavating tool {8}
253  DF  .~.~ Fed by scraper blade {2}
256.~.~.~ Including centrifugal impeller

DEFINITION

Classification: 37/256

Including centrifugal impeller:

(under subclass 253) Apparatus wherein the implement includes a generally radially projecting vane means adapted to transport snow or ice centrifugal force.