Hierarchy/Derived subclasses
| 451 / 1 | -> 11 | -> 12 | -> 13 |
uspto searches
Patent Apps in 451/12Granted Patents in 451/12
Use the links above or do an advanced search in ppubs for:
(451/12.ccls. or 451/13.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.