Hierarchy/Derived subclasses
| 109 / 23 | -> 38 | -> 40 | -> 41 |
uspto searches
Patent Apps in 109/40Granted Patents in 109/40
Use the links above or do an advanced search in ppubs for:
(109/40.ccls. or 109/41.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.