Hierarchy/Derived subclasses
| 70 / 14 | -> 20 | -> 21 |
uspto searches
Patent Apps in 70/21Granted Patents in 70/21
Use the links above or do an advanced search in ppubs for:
(70/21.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.