US PATENT SUBCLASS 37 / 239
.~.~ Multistage conveyors


Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
237  DF  .~ With endless conveyor {3}
239.~.~ Multistage conveyors


DEFINITION

Classification: 37/239

Multistage conveyors:

(under subclass 237) Apparatus including a plurality of various closed loop conveying means, the various means each adapted to accomplish a different step in the excavating process.