US PATENT SUBCLASS 37 / 239
.~.~ Multistage conveyors
Current as of:
June, 1999
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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.