Hierarchy/Derived subclasses
| 438 / 22 | -> 37 |
uspto searches
Patent Apps in 438/37Granted Patents in 438/37
Use the links above or do an advanced search in ppubs for:
(438/37.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.