Hierarchy/Derived subclasses
| 266 / 249 | -> 251 | -> 252 | -> 253 | |
| -> 254 | ||||
| -> 255 | -> 256 | |||
| -> 257 | ||||
| -> 258 |
uspto searches
Patent Apps in 266/251Granted Patents in 266/251
Use the links above or do an advanced search in ppubs for:
(266/251.ccls. or 266/252.ccls. or 266/253.ccls. or 266/254.ccls. or 266/255.ccls. or 266/256.ccls. or 266/257.ccls. or 266/258.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.