Hierarchy/Derived subclasses
| 449 / 3 | -> 27 | -> 28 |
uspto searches
Patent Apps in 449/27Granted Patents in 449/27
Use the links above or do an advanced search in ppubs for:
(449/27.ccls. or 449/28.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.