USPC Class Details

Description: 454 ventilation / 454 ventilation/(173) storage area for perishables (174) harvested crop ventilation (175) having perforated or slotted duct contacting crop (177) horizontal and vertical perforated or slotted ducts (178) with air pump

Hierarchy/Derived subclasses

454 / 173

-> 174

-> 175

-> 177

-> 178

uspto searches

Patent Apps in 454/178

Granted Patents in 454/178

Use the links above or do an advanced search in ppubs for:
(454/178.ccls.)

This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.

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