Hierarchy/Derived subclasses
| 434 / 156 | -> 162 | -> 163 | -> 164 |
uspto searches
Patent Apps in 434/164Granted Patents in 434/164
Use the links above or do an advanced search in ppubs for:
(434/164.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.