US PATENT SUBCLASS 172 / 234
.~ Relatively movable

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

233  DF  WITH OBSTRUCTION FEELER FOR MOVING OR RELEASING IMPLEMENT TO AVOID OBSTRUCTION (INCLUDES DAM FORMER) {1}
234.~ Relatively movable {1}
235  DF  .~.~> Latch releasing

DEFINITION

Classification: 172/234

(under subclass 233) Apparatus in which the feeler means is movable relative to the implement part to be moved.