Hierarchy/Derived subclasses
| 307 / 11 | -> 18 | -> 19 | -> 20 | |
| -> 21 | -> 22 |
uspto searches
Patent Apps in 307/19Granted Patents in 307/19
Use the links above or do an advanced search in ppubs for:
(307/19.ccls. or 307/20.ccls. or 307/21.ccls. or 307/22.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.