Hierarchy/Derived subclasses
137 / 38 | -> 40 | -> 41 |
-> 42 |
uspto searches
Patent Apps in 137/40Granted Patents in 137/40
Use the links above or do an advanced search in ppubs for:
(137/40.ccls. or 137/41.ccls. or 137/42.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.