Hierarchy/Derived subclasses
| 451 / 64 | -> 177 | -> 178 | -> 231 | -> 233 |
uspto searches
Patent Apps in 451/233Granted Patents in 451/233
Use the links above or do an advanced search in ppubs for:
(451/233.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.