US PATENT SUBCLASS 172 / 770
.~.~ Angularly related tool surfaces

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

681  DF  TOOL, STANDARD OR CONNECTION {32}
765  DF  .~ Specific tool shape {5}
770.~.~ Angularly related tool surfaces

DEFINITION

Classification: 172/770

(under subclass 765) Apparatus wherein the tool comprises two portions or surfaces which meet along a line so as to form a sharp angle therebetween of substantially less than 180 deg..