US PATENT SUBCLASS 172 / 765
.~ Specific tool shape

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

681  DF  TOOL, STANDARD OR CONNECTION {32}
765.~ Specific tool shape {5}
766  DF  .~.~> Tool with parallel fingers or blades
768  DF  .~.~> Draw cut type
769  DF  .~.~> Separable parts
770  DF  .~.~> Angularly related tool surfaces
771  DF  .~.~> With curved surface

DEFINITION

Classification: 172/765

(under subclass 681) Apparatus in which a claim includes a specific recitation of the shape of the earth working element for the earth working function.

SEE OR SEARCH THIS CLASS, SUBCLASS:

721+, for symmetrically shaped earth working elements.

754+, for moldboard-type implements and particularly subclass 760 for specific moldboard shape.