Hierarchy/Derived subclasses
| 194 / 215 | -> 225 | -> 226 | -> 227 |
| -> 228 |
uspto searches
Patent Apps in 194/225Granted Patents in 194/225
Use the links above or do an advanced search in ppubs for:
(194/225.ccls. or 194/226.ccls. or 194/227.ccls. or 194/228.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.