Hierarchy/Derived subclasses
| 252 / 500 | -> 512 | -> 514 |
uspto searches
Patent Apps in 252/514Granted Patents in 252/514
Use the links above or do an advanced search in ppubs for:
(252/514.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.