Hierarchy/Derived subclasses
| 236 / 67 | -> 90 |
uspto searches
Patent Apps in 236/90Granted Patents in 236/90
Use the links above or do an advanced search in ppubs for:
(236/90.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.