Hierarchy/Derived subclasses
| 270 / 52.01 | -> 52.14 | -> 52.19 | -> 52.23 | -> 52.24 |
| -> 52.25 |
uspto searches
Patent Apps in 270/52.23Granted Patents in 270/52.23
Use the links above or do an advanced search in ppubs for:
(270/52.23.ccls. or 270/52.24.ccls. or 270/52.25.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.