Hierarchy/Derived subclasses
427 / 457 | -> 532 | -> 540 |
uspto searches
Patent Apps in 427/540Granted Patents in 427/540
Use the links above or do an advanced search in ppubs for:
(427/540.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.