US PATENT SUBCLASS 111 / 146
.~.~.~ Spring tooth

Current as of: June, 1999
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111 /   HD   PLANTING

14  DF  DRILLING {12}
144  DF  .~ Including mulching accessory {1}
145  DF  .~.~ Harrow {1}
146.~.~.~ Spring tooth

DEFINITION

Classification: 111/146

Spring tooth:

(under subclass 145) Apparatus wherein the harrow includes resilient spikes which are drawn through the soil.