Hierarchy/Derived subclasses
| 213 / 7 | -> 12 | -> 13 | -> 14 |
| -> 15 | |||
| -> 16 | -> 17 | ||
| -> 18 | -> 19 | ||
| -> 20 | -> 21 |
uspto searches
Patent Apps in 213/12Granted Patents in 213/12
Use the links above or do an advanced search in ppubs for:
(213/12.ccls. or 213/13.ccls. or 213/14.ccls. or 213/15.ccls. or 213/16.ccls. or 213/17.ccls. or 213/18.ccls. or 213/19.ccls. or 213/20.ccls. or 213/21.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.