US PATENT SUBCLASS 172 / 729
.~.~.~ Adjustable

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}
727  DF  .~.~ With attached runner or depth gauge {2}
729.~.~.~ Adjustable

DEFINITION

Classification: 172/729

(under subclass 727) Apparatus in which the relative positions of the earth working element and runner or depth gauge may be selectively changed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

665, for actuating means for relatively adjusting a tool and runner.

738, for relatively adjustable tools and runners, the tools being of other than the symmetrical type.