US PATENT SUBCLASS 454 / 174
.~ Harvested crop ventilation

Current as of: June, 1999
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454 /   HD   VENTILATION

173  DF  STORAGE AREA FOR PERISHABLES {2}
174.~ Harvested crop ventilation {2}
175  DF  .~.~> Having perforated or slotted duct contacting crop {4}
182  DF  .~.~> Granular crop or corn ears

DEFINITION

Classification: 454/174

Harvested crop ventilation:

(under subclass 173) Subject matter wherein the goods comprise a newly obtained product of the soil.