Hierarchy/Derived subclasses
271 / 3.14 | -> 3.18 | -> 3.21 | -> 3.22 |
uspto searches
Patent Apps in 271/3.22Granted Patents in 271/3.22
Use the links above or do an advanced search in ppubs for:
(271/3.22.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.