US PATENT SUBCLASS 37 / 213
.~.~.~ Screw-type auger

Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
198  DF  .~ Railway clearer {7}
209  DF  .~.~ Having rotary excavating tool {2}
213.~.~.~ Screw-type auger

DEFINITION

Classification: 37/213

Screw-type auger:

(under subclass 209) Apparatus wherein the implement comprises a helical vane means arranged to rotate upon its axis.