Hierarchy/Derived subclasses
D3 / 201 | -> 203.1 | -> 203.2 | -> 203.3 | -> 203.4 |
uspto searches
Patent Apps in D3/203.2Granted Patents in D3/203.2
Use the links above or do an advanced search in ppubs for:
(D3/203.2.ccls. or D3/203.3.ccls. or D3/203.4.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.