Hierarchy/Derived subclasses
| 144 / 2.1 | -> 28.1 | -> 28.3 | -> 28.6 | -> 28.72 |
uspto searches
Patent Apps in 144/28.72Granted Patents in 144/28.72
Use the links above or do an advanced search in ppubs for:
(144/28.72.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.