US PATENT SUBCLASS 172 / 723
.~.~.~ Draw cut point

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}
723.~.~.~ Draw cut point

DEFINITION

Classification: 172/723

(under subclass 722) Apparatus in which the earth-breaking portion has a rearward and downward inclination so as to break the earth by being drawn therethrough.

SEE OR SEARCH THIS CLASS, SUBCLASS:

768, for draw-cut type earth working elements, per se.