Hierarchy/Derived subclasses
| 312 / 216 | -> 217 | -> 218 |
| -> 219 | ||
| -> 220 | ||
| -> 221 |
uspto searches
Patent Apps in 312/216Granted Patents in 312/216
Use the links above or do an advanced search in ppubs for:
(312/216.ccls. or 312/217.ccls. or 312/218.ccls. or 312/219.ccls. or 312/220.ccls. or 312/221.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.