Hierarchy/Derived subclasses
| 44 / 500 | -> 501 |
| -> 502 | |
| -> 503 | |
| -> 504 | |
| -> 505 |
uspto searches
Patent Apps in 44/500Granted Patents in 44/500
Use the links above or do an advanced search in ppubs for:
(44/500.ccls. or 44/501.ccls. or 44/502.ccls. or 44/503.ccls. or 44/504.ccls. or 44/505.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.