Hierarchy/Derived subclasses
337 / 14 | -> 142 | -> 227 | -> 255 | -> 256 | -> 257 | -> 258 | -> 259 |
uspto searches
Patent Apps in 337/256Granted Patents in 337/256
Use the links above or do an advanced search in ppubs for:
(337/256.ccls. or 337/257.ccls. or 337/258.ccls. or 337/259.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.