Hierarchy/Derived subclasses
| 200 / 1r | -> 1a |
uspto searches
Patent Apps in 200/1aGranted Patents in 200/1a
Use the links above or do an advanced search in ppubs for:
(200/1a.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.