Hierarchy/Derived subclasses
254 / 264 | -> 266 | -> 334 | -> 335 | -> 336 | -> 337 |
uspto searches
Patent Apps in 254/336Granted Patents in 254/336
Use the links above or do an advanced search in ppubs for:
(254/336.ccls. or 254/337.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.