Hierarchy/Derived subclasses
277 / 345 | -> 500 | -> 579 | -> 580 | -> 581 |
uspto searches
Patent Apps in 277/581Granted Patents in 277/581
Use the links above or do an advanced search in ppubs for:
(277/581.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.