Hierarchy/Derived subclasses
| 398 / 202 | -> 212 | -> 213 |
uspto searches
Patent Apps in 398/212Granted Patents in 398/212
Use the links above or do an advanced search in ppubs for:
(398/212.ccls. or 398/213.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.