US PATENT SUBCLASS 172 / 609
.~ For plural tools

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

606  DF  WITH CLEANER {4}
609.~ For plural tools

DEFINITION

Classification: 172/609

(under subclass 606) Apparatus including a plurality of earth working elements and means to remove material from the surface of or from between the elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

607, for a plurality of teeth and cleaning means which surrounds the teeth.