Hierarchy/Derived subclasses
| 84 / 1 | -> 600 | -> 601 | -> 641 | -> 642 |
uspto searches
Patent Apps in 84/641Granted Patents in 84/641
Use the links above or do an advanced search in ppubs for:
(84/641.ccls. or 84/642.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.