US PATENT SUBCLASS 37 / 274
.~.~.~ And auxiliary wing or extension

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}
272  DF  .~.~ V-shaped {5}
274.~.~.~ And auxiliary wing or extension {1}
275  DF  .~.~.~.~> Top flap

DEFINITION

Classification: 37/274

And auxiliary wing or extension:

(under subclass 272) Apparatus including an additional moldboard-like element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

104, for an apparatus for forming a railway slope.

SEE OR SEARCH CLASS

172, Earth Working,

782, for a road grader with a laterally offset, inclined shoulder forming blade; subclasses 786+ for a road grader having plural blades; and subclass 815 for a bulldozer having plural blades.