Hierarchy/Derived subclasses
217 / 5 | -> 18 | -> 26 | -> 27 |
uspto searches
Patent Apps in 217/27Granted Patents in 217/27
Use the links above or do an advanced search in ppubs for:
(217/27.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.