Hierarchy/Derived subclasses
220 / 23.83 | -> 23.87 | -> 23.89 |
uspto searches
Patent Apps in 220/23.89Granted Patents in 220/23.89
Use the links above or do an advanced search in ppubs for:
(220/23.89.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.