Hierarchy/Derived subclasses
277 / 345 | -> 500 | -> 549 | -> 553 | -> 558 |
uspto searches
Patent Apps in 277/558Granted Patents in 277/558
Use the links above or do an advanced search in ppubs for:
(277/558.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.