Hierarchy/Derived subclasses
| 452 / 12 | -> 13 | -> 14 |
| -> 15 | ||
| -> 16 | ||
| -> 17 | ||
| -> 18 | -> 19 | |
| -> 20 |
uspto searches
Patent Apps in 452/12Granted Patents in 452/12
Use the links above or do an advanced search in ppubs for:
(452/12.ccls. or 452/13.ccls. or 452/14.ccls. or 452/15.ccls. or 452/16.ccls. or 452/17.ccls. or 452/18.ccls. or 452/19.ccls. or 452/20.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.