Hierarchy/Derived subclasses
257 / 213 | -> 215 | -> 245 | -> 246 | -> 247 |
-> 248 |
uspto searches
Patent Apps in 257/246Granted Patents in 257/246
Use the links above or do an advanced search in ppubs for:
(257/246.ccls. or 257/247.ccls. or 257/248.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.