Hierarchy/Derived subclasses
| 213 / 75r | -> 75b |
uspto searches
Patent Apps in 213/75BGranted Patents in 213/75B
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.