Hierarchy/Derived subclasses
| 166 / 67 | -> 71 |
uspto searches
Patent Apps in 166/71Granted Patents in 166/71
Use the links above or do an advanced search in ppubs for:
(166/71.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.