US PATENT SUBCLASS 172 / 392
.~ Plural runner supported implements relatively movable during operation

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

387  DF  WITH WHEEL SUBSTITUTE (E.G., RUNNER, ETC.) {6}
392.~ Plural runner supported implements relatively movable during operation

DEFINITION

Classification: 172/392

(under subclass 387) Apparatus in which the device comprises a plurality of implements which are relatively movable during operation of the device and each of the implements have a runner associated therewith.

SEE OR SEARCH THIS CLASS, SUBCLASS:

310+, for plural wheeled implements.