Hierarchy/Derived subclasses
| 138 / 118 | -> 120 |
uspto searches
Patent Apps in 138/120Granted Patents in 138/120
Use the links above or do an advanced search in ppubs for:
(138/120.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.