Hierarchy/Derived subclasses
| 313 / 523 | -> 538 |
uspto searches
Patent Apps in 313/538Granted Patents in 313/538
Use the links above or do an advanced search in ppubs for:
(313/538.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.