Hierarchy/Derived subclasses
| 220 / 581 | -> 586 | -> 588 | -> 589 | -> 590 |
uspto searches
Patent Apps in 220/589Granted Patents in 220/589
Use the links above or do an advanced search in ppubs for:
(220/589.ccls. or 220/590.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.