Hierarchy/Derived subclasses
236 / 67 | -> 91r | -> 91f |
uspto searches
Patent Apps in 236/91FGranted Patents in 236/91F
Use the links above or do an advanced search in ppubs for:
()
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.