Hierarchy/Derived subclasses
| 252 / 2 | -> 4 | -> 6 | -> 6.5 |
uspto searches
Patent Apps in 252/6.5Granted Patents in 252/6.5
Use the links above or do an advanced search in ppubs for:
(252/6.5.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.