Hierarchy/Derived subclasses
| 453 / 18 | -> 19 | -> 23 | -> 24 | -> 25 | |
| -> 26 | -> 27 | ||||
| -> 28 |
uspto searches
Patent Apps in 453/23Granted Patents in 453/23
Use the links above or do an advanced search in ppubs for:
(453/23.ccls. or 453/24.ccls. or 453/25.ccls. or 453/26.ccls. or 453/27.ccls. or 453/28.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.