Hierarchy/Derived subclasses
| 152 / 151 | -> 246 | -> 247 | -> 251 | -> 252 | -> 253 | -> 254 | -> 255 | ||
| -> 256 | -> 257 | ||||||||
| -> 258 | -> 259 | ||||||||
| -> 260 | |||||||||
| -> 261 | -> 262 | -> 263 | -> 264 | ||||||
| -> 265 | -> 266 |
uspto searches
Patent Apps in 152/252Granted Patents in 152/252
Use the links above or do an advanced search in ppubs for:
(152/252.ccls. or 152/253.ccls. or 152/254.ccls. or 152/255.ccls. or 152/256.ccls. or 152/257.ccls. or 152/258.ccls. or 152/259.ccls. or 152/260.ccls. or 152/261.ccls. or 152/262.ccls. or 152/263.ccls. or 152/264.ccls. or 152/265.ccls. or 152/266.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.