Hierarchy/Derived subclasses
D3 / 201 | -> 254 | -> 261 |
uspto searches
Patent Apps in D3/261Granted Patents in D3/261
Use the links above or do an advanced search in ppubs for:
(D3/261.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.