Hierarchy/Derived subclasses
| 307 / 112 | -> 134 | -> 137 | -> 138 |
uspto searches
Patent Apps in 307/137Granted Patents in 307/137
Use the links above or do an advanced search in ppubs for:
(307/137.ccls. or 307/138.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.