Hierarchy/Derived subclasses
| 177 / 60 | -> 80 | -> 81 |
uspto searches
Patent Apps in 177/81Granted Patents in 177/81
Use the links above or do an advanced search in ppubs for:
(177/81.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.