Hierarchy/Derived subclasses
| 266 / 138 | -> 140 |
uspto searches
Patent Apps in 266/140Granted Patents in 266/140
Use the links above or do an advanced search in ppubs for:
(266/140.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.