Hierarchy/Derived subclasses
| 68 / 3r | -> 28 | -> 52 |
uspto searches
Patent Apps in 68/52Granted Patents in 68/52
Use the links above or do an advanced search in ppubs for:
(68/52.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.