Hierarchy/Derived subclasses
| 122 / 209.1 | -> 214 | -> 220 |
uspto searches
Patent Apps in 122/220Granted Patents in 122/220
Use the links above or do an advanced search in ppubs for:
(122/220.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.