Hierarchy/Derived subclasses
501 / 1 | -> 2 | -> 5 | -> 8 | -> 9 |
uspto searches
Patent Apps in 501/8Granted Patents in 501/8
Use the links above or do an advanced search in ppubs for:
(501/8.ccls. or 501/9.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.