Hierarchy/Derived subclasses
99 / 324 | -> 419 | -> 421r | -> 421p |
uspto searches
Patent Apps in 99/421pGranted Patents in 99/421p
Use the links above or do an advanced search in ppubs for:
(99/421p.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.