Hierarchy/Derived subclasses
| 404 / 17 | -> 47 | -> 53 | -> 54 |
| -> 55 |
uspto searches
Patent Apps in 404/53Granted Patents in 404/53
Use the links above or do an advanced search in ppubs for:
(404/53.ccls. or 404/54.ccls. or 404/55.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.