Hierarchy/Derived subclasses
44 / 300 | -> 321 |
uspto searches
Patent Apps in 44/321Granted Patents in 44/321
Use the links above or do an advanced search in ppubs for:
(44/321.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.