Hierarchy/Derived subclasses
| 144 / 2.1 | -> 3.1 | -> 4.9 |
uspto searches
Patent Apps in 144/4.9Granted Patents in 144/4.9
Use the links above or do an advanced search in ppubs for:
(144/4.9.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.