Hierarchy/Derived subclasses
| 453 / 18 | -> 39 | -> 50 | -> 51 | -> 52 |
uspto searches
Patent Apps in 453/52Granted Patents in 453/52
Use the links above or do an advanced search in ppubs for:
(453/52.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.