Hierarchy/Derived subclasses
266 / 249 | -> 251 | -> 252 | -> 255 | -> 256 |
uspto searches
Patent Apps in 266/255Granted Patents in 266/255
Use the links above or do an advanced search in ppubs for:
(266/255.ccls. or 266/256.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.