US PATENT SUBCLASS 37 / 229
.~.~.~ Electric or solar heat source

Current as of: June, 1999
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37 /   HD   EXCAVATING

196  DF  SNOW OR ICE REMOVING OR GROOMING BY PORTABLE DEVICE {16}
227  DF  .~ With melter {2}
228  DF  .~.~ Having heated transport chamber {1}
229.~.~.~ Electric or solar heat source

DEFINITION

Classification: 37/229

Electric or solar heat source:

(under subclass 228) Apparatus wherein the means for heating the receptacle uses energy produced either by electricity or by the sun.