US PATENT SUBCLASS 37 / 284
.~.~.~ Manually powered

Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
266  DF  .~ Scraper blade {5}
279  DF  .~.~ Diagonally oriented {5}
284.~.~.~ Manually powered

DEFINITION

Classification: 37/284

Manually powered:

(under subclass 279) Apparatus wherein a human being provides the power to either move or operate the moldboard.