Hierarchy/Derived subclasses
| 137 / 47 | -> 51 | -> 52 |
uspto searches
Patent Apps in 137/51Granted Patents in 137/51
Use the links above or do an advanced search in ppubs for:
(137/51.ccls. or 137/52.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.