Hierarchy/Derived subclasses
| 235 / 400 | -> 418 |
uspto searches
Patent Apps in 235/418Granted Patents in 235/418
Use the links above or do an advanced search in ppubs for:
(235/418.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.