Hierarchy/Derived subclasses
208 / 390 | -> 391 | -> only |
uspto searches
Patent Apps in 208/391Granted Patents in 208/391
Use the links above or do an advanced search in ppubs for:
(208/391.ccls. or 208/only.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.