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