Hierarchy/Derived subclasses
720 / 658 | -> 689 | -> 690 |
uspto searches
Patent Apps in 720/690Granted Patents in 720/690
Use the links above or do an advanced search in ppubs for:
(720/690.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.