Hierarchy/Derived subclasses
| 172 / 13 | -> 18 |
uspto searches
Patent Apps in 172/18Granted Patents in 172/18
Use the links above or do an advanced search in ppubs for:
(172/18.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.