Hierarchy/Derived subclasses
| 220 / 9.1 | -> 9.2 | -> 9.3 |
uspto searches
Patent Apps in 220/9.2Granted Patents in 220/9.2
Use the links above or do an advanced search in ppubs for:
(220/9.2.ccls. or 220/9.3.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.