Hierarchy/Derived subclasses
| 423 / 1 | -> 49 | -> 50 | -> 51 |
| -> 52 |
uspto searches
Patent Apps in 423/49Granted Patents in 423/49
Use the links above or do an advanced search in ppubs for:
(423/49.ccls. or 423/50.ccls. or 423/51.ccls. or 423/52.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.