Hierarchy/Derived subclasses
D27 / 172 | -> 180 | -> 181 |
uspto searches
Patent Apps in D27/181Granted Patents in D27/181
Use the links above or do an advanced search in ppubs for:
(D27/181.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.