Hierarchy/Derived subclasses
| 2 / 171 | -> 400 | -> 401 |
uspto searches
Patent Apps in 2/401Granted Patents in 2/401
Use the links above or do an advanced search in ppubs for:
(2/401.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.