Hierarchy/Derived subclasses
| 392 / 307 | -> 309 |
uspto searches
Patent Apps in 392/309Granted Patents in 392/309
Use the links above or do an advanced search in ppubs for:
(392/309.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.