Hierarchy/Derived subclasses
257 / 183 | -> 190 |
uspto searches
Patent Apps in 257/190Granted Patents in 257/190
Use the links above or do an advanced search in ppubs for:
(257/190.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.