Hierarchy/Derived subclasses
720 / 600 | -> 657 |
uspto searches
Patent Apps in 720/657Granted Patents in 720/657
Use the links above or do an advanced search in ppubs for:
(720/657.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.