USPC Class Details

Description: 131 tobacco / 131 tobacco/(290) tobacco treatment (291) puffing (294) by radiant energy

Hierarchy/Derived subclasses

131 / 290-> 291-> 294

uspto searches

Patent Apps in 131/294

Granted Patents in 131/294

Use the links above or do an advanced search in ppubs for:
(131/294.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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