Hierarchy/Derived subclasses
| 312 / 224 | -> 225 | |
| -> 226 | -> 227 |
uspto searches
Patent Apps in 312/224Granted Patents in 312/224
Use the links above or do an advanced search in ppubs for:
(312/224.ccls. or 312/225.ccls. or 312/226.ccls. or 312/227.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.