Hierarchy/Derived subclasses
522 / 903 |
uspto searches
Patent Apps in 522/903Granted Patents in 522/903
Use the links above or do an advanced search in ppubs for:
(522/903.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.