Hierarchy/Derived subclasses
| 451 / 64 | -> 119 | -> 158 | -> 159 | |
| -> 160 | -> 161 |
uspto searches
Patent Apps in 451/158Granted Patents in 451/158
Use the links above or do an advanced search in ppubs for:
(451/158.ccls. or 451/159.ccls. or 451/160.ccls. or 451/161.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.