Hierarchy/Derived subclasses
| 452 / 177 | -> 178 |
uspto searches
Patent Apps in 452/178Granted Patents in 452/178
Use the links above or do an advanced search in ppubs for:
(452/178.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.