Hierarchy/Derived subclasses
| 420 / 513 | -> 514 | -> 515 | -> 517 |
uspto searches
Patent Apps in 420/517Granted Patents in 420/517
Use the links above or do an advanced search in ppubs for:
(420/517.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.