US PATENT SUBCLASS 172 / 187
.~.~ Differing in size

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

133  DF  DIVERSE TOOLS {29}
184  DF  .~ Diverse rolling {3}
187.~.~ Differing in size

DEFINITION

Classification: 172/187

(under subclass 184) Apparatus in which the earth working elements are of substantially similar shape, but differ in size.

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185, for similarly shaped different size rolling earth working elements which rotate about the same axis.