USPC Class Details

Description: 131 tobacco / 131 tobacco/(329) tobacco users' appliance (330) device used for smoking (187) cigar and cigarette holders (188) with piercing device (189) smoke conducting

Hierarchy/Derived subclasses

131 / 329

-> 330

-> 187

-> 188

-> 189

uspto searches

Patent Apps in 131/189

Granted Patents in 131/189

Use the links above or do an advanced search in ppubs for:
(131/189.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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