Hierarchy/Derived subclasses
| 276 / 2 | -> 3 | -> 4 |
uspto searches
Patent Apps in 276/3Granted Patents in 276/3
Use the links above or do an advanced search in ppubs for:
(276/3.ccls. or 276/4.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.