Hierarchy/Derived subclasses
701 / 400 | -> 408 | -> 409 | -> 410 | -> 420 | -> 421 |
uspto searches
Patent Apps in 701/421Granted Patents in 701/421
Use the links above or do an advanced search in ppubs for:
(701/421.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.