Hierarchy/Derived subclasses
| 313 / 523 | -> 531 |
uspto searches
Patent Apps in 313/531Granted Patents in 313/531
Use the links above or do an advanced search in ppubs for:
(313/531.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.