Hierarchy/Derived subclasses
| 216 / 52 | -> 53 |
uspto searches
Patent Apps in 216/53Granted Patents in 216/53
Use the links above or do an advanced search in ppubs for:
(216/53.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.