Hierarchy/Derived subclasses
52 / 80.1 | -> 81.1 | -> 81.2 | -> 81.3 |
uspto searches
Patent Apps in 52/81.2Granted Patents in 52/81.2
Use the links above or do an advanced search in ppubs for:
(52/81.2.ccls. or 52/81.3.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.