Hierarchy/Derived subclasses
220 / 4.01 | -> 8 |
uspto searches
Patent Apps in 220/8Granted Patents in 220/8
Use the links above or do an advanced search in ppubs for:
(220/8.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.