Hierarchy/Derived subclasses
| 131 / 280 | -> 282 | -> 283 |
uspto searches
Patent Apps in 131/282Granted Patents in 131/282
Use the links above or do an advanced search in ppubs for:
(131/282.ccls. or 131/283.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.