Hierarchy/Derived subclasses
| 224 / 101 | -> 191 | -> 251 |
uspto searches
Patent Apps in 224/251Granted Patents in 224/251
Use the links above or do an advanced search in ppubs for:
(224/251.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.