Hierarchy/Derived subclasses
| 452 / 30 | -> 35 | -> 37 | -> 39 |
uspto searches
Patent Apps in 452/39Granted Patents in 452/39
Use the links above or do an advanced search in ppubs for:
(452/39.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.