Hierarchy/Derived subclasses
| 54 / 56 |
uspto searches
Patent Apps in 54/56Granted Patents in 54/56
Use the links above or do an advanced search in ppubs for:
(54/56.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.