Hierarchy/Derived subclasses
| 24 / 49.1 | -> 66.4 |
uspto searches
Patent Apps in 24/66.4Granted Patents in 24/66.4
Use the links above or do an advanced search in ppubs for:
(24/66.4.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.