Hierarchy/Derived subclasses
| 226 / 52 | -> 74 | -> 75 |
uspto searches
Patent Apps in 226/74Granted Patents in 226/74
Use the links above or do an advanced search in ppubs for:
(226/74.ccls. or 226/75.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.