Hierarchy/Derived subclasses
| 252 / 625 | -> 634 | -> 635 |
uspto searches
Patent Apps in 252/635Granted Patents in 252/635
Use the links above or do an advanced search in ppubs for:
(252/635.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.