Hierarchy/Derived subclasses
| 68 / 3r | -> 135 | -> 136 | -> 137 |
uspto searches
Patent Apps in 68/137Granted Patents in 68/137
Use the links above or do an advanced search in ppubs for:
(68/137.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.