Hierarchy/Derived subclasses
| 368 / 223 | -> 228 | -> 238 |
uspto searches
Patent Apps in 368/238Granted Patents in 368/238
Use the links above or do an advanced search in ppubs for:
(368/238.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.