Hierarchy/Derived subclasses
| 312 / 21 | -> 22 | -> 23 | -> 24 |
| -> 25 | |||
| -> 26 |
uspto searches
Patent Apps in 312/23Granted Patents in 312/23
Use the links above or do an advanced search in ppubs for:
(312/23.ccls. or 312/24.ccls. or 312/25.ccls. or 312/26.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.