Hierarchy/Derived subclasses
| 152 / 151 | -> 185 | -> 187 | -> 188 |
| -> 189 |
uspto searches
Patent Apps in 152/187Granted Patents in 152/187
Use the links above or do an advanced search in ppubs for:
(152/187.ccls. or 152/188.ccls. or 152/189.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.