US PATENT SUBCLASS 111 / 155
.~.~.~ Spring formed tool or standard

Current as of: June, 1999
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111 /   HD   PLANTING

14  DF  DRILLING {12}
149  DF  .~ Furrow opener {7}
154  DF  .~.~ Boot opener (e.g., tooth or tine) {1}
155.~.~.~ Spring formed tool or standard

DEFINITION

Classification: 111/155

Spring formed tool or standard:

(under subclass 154) Apparatus in which the furrow-opening element or its intermediate supporting means is formed of resilient material.

SEE OR SEARCH CLASS

172, Earth Working,

707+, for resilient tine-type furrow openers, per se.