Hierarchy/Derived subclasses
| 451 / 28 | -> 36 | -> 37 | |
| -> 38 | -> 39 | ||
| -> 40 |
uspto searches
Patent Apps in 451/36Granted Patents in 451/36
Use the links above or do an advanced search in ppubs for:
(451/36.ccls. or 451/37.ccls. or 451/38.ccls. or 451/39.ccls. or 451/40.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.