Hierarchy/Derived subclasses
| 180 / 252 | -> 253 | -> 254 | -> 255 | ||
| -> 256 | -> 257 | ||||
| -> 258 | -> 259 | ||||
| -> 260 | -> 261 | -> 262 | |||
| -> 263 | |||||
| -> 264 | -> 265 | ||||
| -> 266 | |||||
| -> 267 |
uspto searches
Patent Apps in 180/252Granted Patents in 180/252
Use the links above or do an advanced search in ppubs for:
(180/252.ccls. or 180/253.ccls. or 180/254.ccls. or 180/255.ccls. or 180/256.ccls. or 180/257.ccls. or 180/258.ccls. or 180/259.ccls. or 180/260.ccls. or 180/261.ccls. or 180/262.ccls. or 180/263.ccls. or 180/264.ccls. or 180/265.ccls. or 180/266.ccls. or 180/267.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.