Hierarchy/Derived subclasses
| 378 / 119 | -> 121 | -> 139 |
uspto searches
Patent Apps in 378/139Granted Patents in 378/139
Use the links above or do an advanced search in ppubs for:
(378/139.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.