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