Hierarchy/Derived subclasses
439 / 38 | -> 39 |
-> 40 |
uspto searches
Patent Apps in 439/38Granted Patents in 439/38
Use the links above or do an advanced search in ppubs for:
(439/38.ccls. or 439/39.ccls. or 439/40.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.