Hierarchy/Derived subclasses
| 213 / 7 | -> 50 | -> 51 | -> 52 |
| -> 53 |
uspto searches
Patent Apps in 213/51Granted Patents in 213/51
Use the links above or do an advanced search in ppubs for:
(213/51.ccls. or 213/52.ccls. or 213/53.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.