Hierarchy/Derived subclasses
| 2 / 171 | -> 311 | -> 321 | -> 322 |
uspto searches
Patent Apps in 2/321Granted Patents in 2/321
Use the links above or do an advanced search in ppubs for:
(2/321.ccls. or 2/322.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.