US PATENT SUBCLASS 172 / 724
.~.~.~ Wings integral

Current as of: June, 1999
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172 /   HD   EARTH WORKING

681  DF  TOOL, STANDARD OR CONNECTION {32}
721  DF  .~ Non-rectangular, symmetrical type {8}
722  DF  .~.~ Earth breaking part and separately attached wings {2}
724.~.~.~ Wings integral

DEFINITION

Classification: 172/724

(under subclass 722) Apparatus in which the wings are made of a single piece of material separately attached to the earth-breaking portion.