Hierarchy/Derived subclasses
| 252 / 175 | -> 180 | -> 181 |
uspto searches
Patent Apps in 252/180Granted Patents in 252/180
Use the links above or do an advanced search in ppubs for:
(252/180.ccls. or 252/181.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.