Hierarchy/Derived subclasses
| 138 / 156 | -> 168 |
uspto searches
Patent Apps in 138/168Granted Patents in 138/168
Use the links above or do an advanced search in ppubs for:
(138/168.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.