Hierarchy/Derived subclasses
| 273 / 138.1 | -> 141r | -> 141a |
uspto searches
Patent Apps in 273/141RGranted Patents in 273/141R
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.