Hierarchy/Derived subclasses
| 303 / 50 | -> 54 | -> 55 |
uspto searches
Patent Apps in 303/54Granted Patents in 303/54
Use the links above or do an advanced search in ppubs for:
(303/54.ccls. or 303/55.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.