Hierarchy/Derived subclasses
| 271 / 8.1 | -> 226 | -> 233 |
uspto searches
Patent Apps in 271/233Granted Patents in 271/233
Use the links above or do an advanced search in ppubs for:
(271/233.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.