Hierarchy/Derived subclasses
| 252 / 500 | -> 517 |
uspto searches
Patent Apps in 252/517Granted Patents in 252/517
Use the links above or do an advanced search in ppubs for:
(252/517.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.