Hierarchy/Derived subclasses
| 220 / 500 | -> 505 |
uspto searches
Patent Apps in 220/505Granted Patents in 220/505
Use the links above or do an advanced search in ppubs for:
(220/505.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.