Hierarchy/Derived subclasses
414 / 137.1 | -> 137.9 | -> 138.2 | -> 138.4 |
uspto searches
Patent Apps in 414/138.4Granted Patents in 414/138.4
Use the links above or do an advanced search in ppubs for:
(414/138.4.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.