US PATENT SUBCLASS 454 / 181
.~.~.~ With air pump

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


454 /   HD   VENTILATION

173  DF  STORAGE AREA FOR PERISHABLES {2}
174  DF  .~ Harvested crop ventilation {2}
175  DF  .~.~ Having perforated or slotted duct contacting crop {4}
181.~.~.~ With air pump

DEFINITION

Classification: 454/181

With air pump:

(under subclass 175) Subject matter comprising an air moving apparatus which forces the air into or withdraws it from the ventilated space.

SEE OR SEARCH THIS CLASS, SUBCLASS:

178, for horizontal and vertical perforated or slotted harvested crop ventilating ducts with an air pump.

180, for a horizontal perforated or slotted harvested crop ventilating duct with an air pump.