Hierarchy/Derived subclasses
277 / 345 | -> 434 | -> 436 | -> 438 | -> 439 |
uspto searches
Patent Apps in 277/438Granted Patents in 277/438
Use the links above or do an advanced search in ppubs for:
(277/438.ccls. or 277/439.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.