Hierarchy/Derived subclasses
| 231 / 2.1 | -> 7 |
uspto searches
Patent Apps in 231/7Granted Patents in 231/7
Use the links above or do an advanced search in ppubs for:
(231/7.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.