US PATENT SUBCLASS 172 / 253
.~.~ Tool added or substracted

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

245  DF  CONVERTIBLE; OR CHANGEABLE BY DISASSEMBLY OR ASSEMBLY {5}
250  DF  .~ Changeable by disassembly or assembly {3}
253.~.~ Tool added or substracted

DEFINITION

Classification: 172/253

(under subclass 250) Apparatus in which the alteration of the apparatus comprises the addition of an earth working element or the removal of an earth working element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

341, for hand guided wheeled straddle row type cultivators with an added intermediate tool.

568, for a disk gang with a removable section.