Hierarchy/Derived subclasses
| 232 / 17 | -> 19 | -> 20 | -> 21 |
uspto searches
Patent Apps in 232/20Granted Patents in 232/20
Use the links above or do an advanced search in ppubs for:
(232/20.ccls. or 232/21.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.