Hierarchy/Derived subclasses
| 47 / 904 |
uspto searches
Patent Apps in 47/904Granted Patents in 47/904
Use the links above or do an advanced search in ppubs for:
(47/904.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.