Hierarchy/Derived subclasses
| 310 / 10 | -> 15 | -> 17 | -> 20 | -> 21 | -> 22 |
uspto searches
Patent Apps in 310/21Granted Patents in 310/21
Use the links above or do an advanced search in ppubs for:
(310/21.ccls. or 310/22.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.