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