Hierarchy/Derived subclasses
| 368 / 319 | -> 320 | -> 321 |
uspto searches
Patent Apps in 368/321Granted Patents in 368/321
Use the links above or do an advanced search in ppubs for:
(368/321.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.