Hierarchy/Derived subclasses
| 336 / 137 | -> 149 |
uspto searches
Patent Apps in 336/149Granted Patents in 336/149
Use the links above or do an advanced search in ppubs for:
(336/149.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.