US PATENT SUBCLASS 37 / 357
.~.~.~.~ With distinct rotary digger

Current as of: June, 1999
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37 /   HD   EXCAVATING

347  DF  DITCHER {8}
352  DF  .~ Having endless digger {1}
353  DF  .~.~ Endless bucket {2}
355  DF  .~.~.~ Longitudinal cut {7}
357.~.~.~.~ With distinct rotary digger

DEFINITION

Classification: 37/357

With distinct rotary digger:

(under subclass 355) Apparatus combined with a supplementary excavating mechanism (e.g., a rotary cutting disc, a rotary cutting knife, a rotary cutting pick) operating in unison with the chain to widen the trench dug by the excavator.