Hierarchy/Derived subclasses
277 / 345 | -> 358 | -> 390 | -> 391 | -> 392 |
-> 393 |
uspto searches
Patent Apps in 277/391Granted Patents in 277/391
Use the links above or do an advanced search in ppubs for:
(277/391.ccls. or 277/392.ccls. or 277/393.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.