Hierarchy/Derived subclasses
91 / 196 | -> 210 | -> 211 | -> 213 |
uspto searches
Patent Apps in 91/213Granted Patents in 91/213
Use the links above or do an advanced search in ppubs for:
(91/213.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.