Hierarchy/Derived subclasses
501 / 1 | -> 11 | -> 41 | -> 42 |
uspto searches
Patent Apps in 501/42Granted Patents in 501/42
Use the links above or do an advanced search in ppubs for:
(501/42.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.