Hierarchy/Derived subclasses
| 70 / 57 | -> 237 | -> 255 |
uspto searches
Patent Apps in 70/255Granted Patents in 70/255
Use the links above or do an advanced search in ppubs for:
(70/255.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.