Hierarchy/Derived subclasses
138 / 118 | -> 121 | -> 122 |
uspto searches
Patent Apps in 138/121Granted Patents in 138/121
Use the links above or do an advanced search in ppubs for:
(138/121.ccls. or 138/122.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.