Hierarchy/Derived subclasses
| 2 / 455 | -> 410 | -> 421 |
uspto searches
Patent Apps in 2/421Granted Patents in 2/421
Use the links above or do an advanced search in ppubs for:
(2/421.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.