Hierarchy/Derived subclasses
556 / 400 | -> 445 | -> 446 |
-> 447 | ||
-> 448 |
uspto searches
Patent Apps in 556/445Granted Patents in 556/445
Use the links above or do an advanced search in ppubs for:
(556/445.ccls. or 556/446.ccls. or 556/447.ccls. or 556/448.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.