Hierarchy/Derived subclasses
| 452 / 21 | -> 29 |
uspto searches
Patent Apps in 452/29Granted Patents in 452/29
Use the links above or do an advanced search in ppubs for:
(452/29.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.