Hierarchy/Derived subclasses
337 / 14 | -> 142 | -> 227 | -> 228 | -> 251 | -> 252 | -> 253 | -> 254 |
uspto searches
Patent Apps in 337/252Granted Patents in 337/252
Use the links above or do an advanced search in ppubs for:
(337/252.ccls. or 337/253.ccls. or 337/254.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.