Hierarchy/Derived subclasses
| 277 / 322 | -> 331 | -> 332 |
uspto searches
Patent Apps in 277/332Granted Patents in 277/332
Use the links above or do an advanced search in ppubs for:
(277/332.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.