Hierarchy/Derived subclasses
220 / 500 | -> 507 | -> 509 | -> 516 | -> 517 |
uspto searches
Patent Apps in 220/517Granted Patents in 220/517
Use the links above or do an advanced search in ppubs for:
(220/517.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.