Hierarchy/Derived subclasses
442 / 181 | -> 239 | -> 240 | -> 241 |
-> 242 |
uspto searches
Patent Apps in 442/240Granted Patents in 442/240
Use the links above or do an advanced search in ppubs for:
(442/240.ccls. or 442/241.ccls. or 442/242.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.