Hierarchy/Derived subclasses
| 138 / 156 | -> 157 | -> 158 | -> 159 | -> 160 |
| -> 161 |
uspto searches
Patent Apps in 138/158Granted Patents in 138/158
Use the links above or do an advanced search in ppubs for:
(138/158.ccls. or 138/159.ccls. or 138/160.ccls. or 138/161.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.