Hierarchy/Derived subclasses
| 313 / 364 | -> 421 | -> 426 | -> 427 | -> 428 |
uspto searches
Patent Apps in 313/428Granted Patents in 313/428
Use the links above or do an advanced search in ppubs for:
(313/428.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.