Hierarchy/Derived subclasses
| 152 / 151 | -> 208 | -> 225r | -> 226 | -> 227 | -> 228 |
| -> 229 | -> 230 |
uspto searches
Patent Apps in 152/226Granted Patents in 152/226
Use the links above or do an advanced search in ppubs for:
(152/226.ccls. or 152/227.ccls. or 152/228.ccls. or 152/229.ccls. or 152/230.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.