USPC Class Details

Description: 454 ventilation / 454 ventilation/(1) chimney or stack (3) chimneytop or stacktop structure (e.g., cowl) (8) inlet and outlet (9) having air current responsive adjustment means (e.g., wind vane, etc.)

Hierarchy/Derived subclasses

454 / 1

-> 3

-> 8

-> 9

uspto searches

Patent Apps in 454/9

Granted Patents in 454/9

Use the links above or do an advanced search in ppubs for:
(454/9.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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